Thanks a lot for splitting the floors back into quads!
My only remaining concern is that the medbay specifically now looks dirty grey, instead of sterile white. It's not a problem with dots, but rather with the base color.
I'd think simply increasing the brighness of the base fill color (and adjusting the dots accordingly) would probably solve this.
The loss of 2x2 segmenting when adjacent sub-tiles are of the same color ruins the floor painter game, and it's a deal-breaker.
But I could see me liking these if the segmentation was reintroduced.