"The reason why the game seems dull is the AI behaviour and general gameplay inconsistency."
IMO, the inconsistencies are what keep me messing around with the game.
As to the orbital problems, I was going to suggest that there are unit nullifiers available as well. In hindsight, their range was nerfed a bit too much considering the army formation tweaks that happened later. Yeah, it is frustrating watching multiple Detonates/carving lasers insta-wipe the expensive vanguard of your army.
I think they could improve how the higher ai levels get quanta because orbitals can happen too often while they get their big boosts. Perhaps let them keep their eco boosts but cut down their quanta boost a lot so they can't spam abilities so much, especially when vs multiple AI. Or make it a player tweakable option. AI needs a lot of work overall tbh.
I have to agree here, Quanta is broken in the higher level AIs. Since they already have an eco boost, I say let them build the generators themselves.
AI really does need work, especially PHC. Is there even a faction difference in the code?
I played with orbitals OFF but I don't think that cutting down game options will improve the game in any way.
This is actually MORE options to tailor a game to a players taste. It seems in your case that this is not really viable for your troubles. All of that Quanta would simply be poured into unit/structure upgrades that will ROFLstomp your seemingly powerful units in a similarly frustrating manner. Ever seen a smarty/barrager w/25k hp?
I would encourage you to at least check back peroidically. This game is still a work in progress and that is keeping my interest so far, despite it's shortcommings.