I didn't say I didn't like the graphics, just that I don't think they have enough contrast with the ground to be reliably picked out at a glance. I do find them very distinguishable from each other and easy on the eyes, which is the important thing.
Also, I don't like team games (with FPS it can be okay), as a general rule. I'd much rather play Tennis or Squash than Soccer or Hockey. However, I think Zero-K can work up to 3v3, possibly 4v4, but beyond that I doubt it. I'm not going to cast games larger than 4v4.