It would ultimately favor those who focus only on raping and pillaging all other groups who's backs were turned trying to expand territory. There would be no safe place to run from combat which having a defined country provides. Amazing how much that doesn't matter until all you have is a single airfield with everyone else crapping on it. AH1 had that evil and players logged rather than repeatedly submit to being humiliated. It was never a matter of not defending but, of slow times and base sneekers with too much time on their hands. We see that a lot now with how territory dramatically changes from evening to evening.
People submit these ideas from a micro perspective of the small amount of time they will be on and the possible maximum potential of fun that "could" happen from their selfish position. They never step back to 90,000 feet and look at it from Hitech's perspective or just how much stick or carrot will be needed. Only the "something different" perspective, where Hitech is the cosmic janitor who follows the parade cleaning up all the unexpected elephant goodies.
If you want to microcosm test this. Make a custom map with a single airfield and Vbase in all three countries. Turn country jumping at will on, turn off kill shooter. The CM would have to reset the map at some point or just allow everyone to clobber each other all night long. It would work better if the red guy icon showed the player ID like green guy icons so allies didn't piss each other off. But, tuning to the same 200's channels would suffice up to a point. Woops spiezzzz. Sounds like a game played by pointy eared freaks with swords, mercenary trolls, and ninja mermaids.