1. We already addressed, really. Something is seriously wrong if after 70m accounts made there is still never enough active accounts online for matching to work without AI. No matter what time I am on, there never seems to be enough players to match me with more than one opponent, two if I am lucky. This game is subject to the same conditions as every other games in terms of regions and timezones, but really, people game just about anytime anywhere. Those games have thrived without AI. Sure, there will be some slow times, but not to the extent we experience in Mech Arena - and that's a crying shame.
2. "Makes sense, but..." But your team doesn't care, in short. After a long enough winstreak, my 2.8k hangar has been placed against 9k hangars...that seem enormous and happening in the current system. The logic here is simple: if you have to keep AI in the game because there isn't enough players, but you can't keep players because of the AI, it seems like the solution is easy. Yes, it'll be bumpy at first as there will be the few players that seem to play now only, but word will get out that AI was removed, gamers will return to see this, population booms.
3. I am unsure how you can even remotely say it is "impossible" when it hasn't even been tried. Not once in my time here has this theory been tested in the actual game, the AI has always been here. What is your teams magical number of players to get at least minimal bot use, like one per a team on average?