Oh that core problem. Yeah.
Given the current features of the mod, I don't think there is much you can do with it. By that I mean, as far as making fairly simple changes like new zones, tweaking the exp system.
I do love the remort system, always looking forward to that next skill up and the prospect of unlimited potential, given enough time. I think the Time Progression solution would be awesome, but that's taking you into a whole new mod. PCRPG 4.0!