I've been playing Infinity for a little over three years now and the measurement issue is worse right now I think because of how its measured has changed. Front to front is new for some people and they get confused. There might be some who are doing it on purpose but what I've done is simply asked them if they noticed they did it after a game. Often this is when I've not been their opponent but just watched as an observer and I soft sell it by saying I only noticed in a few of their moves. The player often then realizes they were doing it far more often and realize they need to remember how movement is measured and stick to it.
As for terrain its a tough thing to get right and what is right for one meta may not be for another. Sparse terrain helps HMGs and sniper and other long range weapons which are often expensive both in points and SWC. Dense terrain helps shotguns, direct template weapons and hacking which outside of hacking are often cheap and low SWC cost. So in fact by going overly dense you skew the game towards horde lists and making peoples 5-6 point models able to wipe out many times worth their points. A sparse table allows for a ~30 point model to kill a couple times worth their points but there are ways to deal with this (simple skirmisher with a rifle within 16" with surprise shot helps deal with a lot of those long range threats). I'm not trying to say sparse is better than dense, just that that one benefits middling to expensive figures and the other benefits cheap horde armies.
Height is fine so long as you have bridges, balconies, other buildings or structures that break up the line of sight going from high to low. If all buildings are one story except for two four story buildings, that can lead to a very unbalanced game. With industrial stacks with catwalks, skyways going from building to building, a covered walkway or such and that sniper can see a lot of table but not a lot of where the armies might be moving through.
Those are my thoughts on the issue. Each person and meta discover their own way and it may not work for everyone. Some people don't like playing against or with Rambo lists. The game tries, its not perfect but its quite solid. Its been more consistent than second edition so we can just hope that it continues to grow and strengthen.