You're asking if this project would allow playing after main quest because you don't want to restart when people start making quest mods for it, and then proclaim no one make those? Wtf? Meh, what's the point of playing these kind of games if there's nothing to do in it? It's only logical for the game to finally end once you're done with the "Main Quest". I don't understand the appeal of continuing a game, especially an RPG, after the ending. There's literally nothing to do, except just fucking around, I guess? Even Fallout 2 RP, the most you can get are dialog reactions to your victory against the Enclave in New Reno, but other than that? Meh. The only RPG that I know to do this whole "continuing after done with main quest" thingy properly is Underrail, even though it wasn't actually "continuing after done with the main quest". You can still explore most of the gameworld at that point, asking people around wtf just happened all this time, even go to a lengthy discussion with an important person regarding key events and individuals. But other than that, there's nothing meaningful to do except choosing the last choices to trigger the ending slides.