Your thoughts about lvluping contacts from any district is very good on one side, but on the other we'll have the situation where waterfront will be always empty because: 1)it's very unbalanced and have a lot of point where you cant do anything to enemy because of OP spots 2)it have many troubles with optimization and you in almost all cases have ~40-50 FPS even on strong PCs but this is intersting feature, me too wanna see this one
For limitations removing i see a plus because it will fill the game with content, without really changing anything: bumpers for factional cars are already existing in-game, so devs dont need to anything: just add options for enforcer players to install additional bumpers without sirens, also, there are balance problems for cars, you know, Vaquero on several goals higher than Mikro, also Jericho is OP in comparison with bishada, but some players still love other faction's cars because of appereance etc., on further i don't see reasons to repeat my words, i said them in this video about Jericho(timing included): https://youtu.be/wlL4REUIsYI?t=1058
I too thought about this, tho, there're not things to do ASAP, so i never hurrying up devs to do what i see a perfect decesions for the game because, lets be real: it's dead rn: no extension content(like races etc), no in-depth content(we have a cars that locked just because and you anyway can buy them with real money, so factional limits only existing for non-donate players), also, i told about racing in this video(only in intro, outro): https://www.youtube.com/watch?v=zZRchGEgLeo
Honestly , i dont think that this will split it, i can say even more: it will bring new players, who dont wanna always have PVP content but also chill with friends on one of the favourite games with a lot of customization options(i knew a lot of players who leaved/dont wanna play in apb because of it's monotonous emphasis in pvp and don't having other options) i also quit playing apb for serious because it's just tired me of on the 10 years that I spent in it - now i just driving around on empty districts and creating video-comparisons and now i'll do racing things with my friends for IGC, because, as you probably understood: they too got bored of same and same gameplay like you're playing in "Groundhog Day"
And i belive that this change will bring new players and also return old ones: it's better when you have time to get used to and learn the mechanics before you get into real fight, i think that also "closing new players" to only PVE content to prevent them got into missions with veterans, before, let's say, like 20-30 rank will be a good idea and will help them more easily integrate into the game