The terrain is the terrain, by its very nature it will define the game, and adapting the base and armies to the terrain is one of the joys of warzone. I don't see this as inbalance but you are right. A king and fools type map is also unbalanced but it has it's place in multiplayer. What you are saying is a bit like saying shattered glass unbalances sandals. Yes it does, but you don't have to walk on it. A map can be opted out of, but once the game starts the relative statistics of the items envolved are what define balance imo, terrain being a given. Statistics which include cost of course and position in the tech tree. I don't think people making maps follow guidelines, they tend to create what they think is fun or, in a few very isolated cases, try to cheat. The community then decides what it wants to play, which is why we see a lot of high oil flat maps, which I know disgust some people because it's just a different game type.
Heres a story of a game I had a few days ago to ilustrate my points: The map was close combat, a 2 player map with 6 generators of oil, full bases with full factories and some artillary already build on the entrance. I got rushed earlyish by a python flamer hover combo with flamer cyborgs. At the same time I was all vtol and walls, having rushed out bug heavy machine gun vtols. He destroyed my base, minus the cyborg factories (under artillary cover). I destroyed all his factories and trucks with my vtols simultaneously (he had no aa). Since he destroyed my pads I was left with a dozen empty vtols and no power. I recycled everything, he was sitting on my oil, I could not go into his base because of artillary and decided to risk going after his python flamer hovers, the surviving units, with 30 machinegunners, after a first failed attempt with grenadiers, which did some damage but left 5 or 6 units alive. It was touch and go but I managed to get all the pythons and see fireworks. To me the fact that a game like this is possible shows that flamers are not too powerfull or I would have lost. Yes, the map favours vtols, because it starts with no aa and chokepoints, but that was what it was designed, by someone else, to do. Or what it does by chance. Not everyone sees it. It probably dosen't follow guidelines but this game was some of the best fun I have had in warzone over the thousands of games I no doubt have played online and will stay as a gaming memory untill I get alzheimers, which at my age will probably be around next tuesday
If you guys consider all this offtopic just delete the post I don't mind.