"I've never really liked weapon ranges in the wargames I play. They never fit the scale, like in WH40k a bolter is 24" and a tank cannon might be 36". Especially with how small the scale of the battle can be, it feels wrong that an elite super human soldier just has no chance of hitting a massive alien beast at 25"."
I'm 100% with you, there. To be clear, I don't think the issue is that the ranges are infinite, only that there's no mitigation outside of cover, and no reason to move. I think the idea to remove ranges is an excellent design choice and could probably be pursued to a great effect.