Fork,
The only person's ideas and direction that matters is Hitech's. You and I have had what, almost 20 years of knowing that. He never talks about major game changes until he is almost ready to make that change. AH1->AH2, AH2->AH3 and so forth. Chances are talking too much about Combat Tour then having to abandon it was a poor route to take with a segment of his customers.
Problem with many ideas is they try to turn AH into the competition's games. Or they are so complex, they will fall apart under their own requirements and bore players to the competition's games which seems to be the inspiration for many ideas for changing AH. It's hard not to pull from experiences in playing other games when trying to change this game if you are on the outside, versus inside building the code and running a business. Many make the easy mistake of forgetting this is Hitech's Industry and he has to stay appraised of his competition's games and "customer hooks" to keep them coming back. Maybe you can have a private conversation with him about his views on that.
I reviewed the competition's terrains to understand what was different. It was something very simple. The ground combat area's were micro textured to look and drive like the real world from a tank perspective. Then the macro terrain was scaled up from there to look real world. That is an area no one other than Greebo in AH2 with CraterMA attempted to work into his terrain. So everything was built all these years on a gross scale to look good to 25k planes in combat while at 1000ft in a furball it didn't matter. I've finally included micro terrain design in my latest project along with compressing fields to the shortest distance Hitech will allow. That will keep some happy for awhile. Also becasue of how small the competition's arenas are, very large city and town objects can be used with complex building arrangements and fun time micro terrain for mario brothers style bumper car tank fights while looking good from the air. In our world, that would grind FPS to a halt becasue 100 of their arenas can be laid down in our 10x10 arena.
As for core mechanisms, too often the urge and end result is something that is reminiscent of WT arenas packed full of eye candy and goodies crossed with a WW2 board game.