Just to go against the current... I think well described characters is often important. While the vast majority of people here are encouraging you (and rightly so) to follow your vision, pointing out the advantages of your strategy, I'd like to point out some disadvantages.
As some of the other answers mention, writing no physical description means the reader is free to imagine what that character is like. I think avoiding physical description is indeed important if the aim of the story is to focus the reader on the inside of the characters rather than the outside.
However, I do tend do think of those characters as ghosts with names, and I will have to puzzle out hints of their physical characteristics. If I can't, I'll probably also fail to imagine the character at all. They'll really end up as named tags in my mind and it's harder to feel a connection to body-less characters. It's easier to get away with it when it's the POV character, but if no one else can be referred as the red-head guy, or the shorty one... that's just weird for me.
You may call me lazy - feel free - but the fact is that most people experience the world above all through vision. If a character is introduced to the POV character, I expect them to register at least one detail of the physical appearance.
Besides that, keep in mind that sometimes it's difficult to remember the names of all the characters, especially if there are a lot. When that happens, one relies on strong physical descriptions (the blonde girl, the skinny guy), strong personality aspects (the stubborn one, the whiny one), strong connections to the MC (a boyfriend, a cousin) or actions (the one who killed the dragon, the one whose parents kicked out). Again, notice that physical aspect isn't essential for everyone, but may be useful for some.
Do note that when I talk about a good description of a character, I mean no info-dump and bringing out only key physical aspects in a natural way.
Due to a number of characters being cryogenic subjects, it was not necessary to describe them. All characters do have names but no descriptions.
If these characters are never seen, sure, I don't see why they'd require a description. But if they are seen, I'll probably feel frustrated that I'm given no hint of how they should look. Creatures? So they're not human or maybe they're humanoid... do they look male, female or androgynous? Cryogenic... they look frozen?
Again, I'm not talking about extensive descriptions massively dropped at awkward moments, but the author created a picture in his mind when he created these characters and, unless there is a message underlying the lack of description, I sometimes do feel cheated out of the author's world. In those cases, you'll excuse me, but I do feel like the author was either too lazy (let the readers imagine them as I don't feel like being bothered with it when there's sweet action to jump into) or too afraid (what if that minority feels left out? I'll just let everyone picture whatever ethny they feel like).
Nevertheless, I know precious little of your story. Perhaps you do have a message that is underlined by making the reader blind and forcing them to imagine everyone as they feel like. In that case, sure, go ahead.
But if there's visual contact with the 'cryogenic creatures', at least give a couple of hints of what they look like. I can imagine them in so many different ways, that I really have no idea what the author was aiming for.
My novel has worked more on character/personality, which was part of the reason I felt physical description was not needed. So perhaps I am not as crazy as I thought (perhaps).
Avoiding physical description at all is not crazy. For as long as it works.
What I'm trying to point out is that you can give a couple of physical descritions here and there with no need to bog things down. For example, despite my defense of physical descriptions, I rarely give full descriptions of my characters. Most often, I either mention height, or size, or hair, or skin tone, or clothes. Occasionally, I may mention two of those. Most people don't notice eye colour unless it's uncommon so I rarely mention it.
My advice is to check with a few beta readers and see if they'd have liked to have a few physical descriptions or if they prefered it stripped to the minimum.
Edit in response to the comment
There are many ways of describing. I'm sure that a lot of people think of description as something as:
Joan was a short young woman with long wavy hair caught in a low ponytail. She entered the abandoned house with a thrill. The carved door whined open and she saw a long dark corridor. The light from the street shone on the cobwebs that covered the ceiling, making it low and creepy. Slowly she started going through it.
Going for no description would turn this hurried example into:
Joan entered the abandoned house with a thrill. The door whined open and she slowly started going through the corridor, the cobwebs above her making it feel creepy. She kept walking on and on, until if felt she would never reach its end.
When I say description is important, I'm thinking in these lines:
Joan entered the abandoned house with a thrill. The carved door whined open and she saw a long dark corridor that made her hesitate for a second. Slowly she started going through it. Thankfully, she was short enought that the cobwebs wouldn't touch her, and she was glad she'd done her hair in a low ponytail rather than the one high up that showcased how long it was. The cobwebs still made the corridor creepy, though.
In the first case, the description is dropped as if trying to paint a picture for the reader. This might make sense if it's the POV of a character that is analysing what they're seeing, but that rarely is the case in writing.
In the second case, the description is minimalist.
The third case once more gives description, but it is tied to what is happening - her low height and the length of her hair are mentioned because it makes sense to do so and those references help the reader create an image of the character without getting the reader out of the story. Even the 'long dark' characteristics of the corridor make sense because they are the ones that make the character hesitate.
When I think of description, this is what I'm thinking of, not the very common and poorly done first example.