A Ren'Py mod can do practically anything. It's just
a lot of work to make a major feature like that, and a PITA to maintain if Goldo is not on board with it.
Eh, we have never really run into genuine
coordination issues. Not because it's not possible, but because people willing to spend
lots and lots of time and effort on the game don't really exist (besides Goldo himself). Most of the significant contributions are small enough that they can be managed on the side by one person (
__neronero's Trait King, Jobgirl, new features for the tagger tool, the attempts at new default pictures, etc), or were set up as collaborative to start with (girl packs, community dialogue).