I'll not hold my breath on juicy world building. That is not Trek's strong suit.
It really isn't. We spend 7 years next to Bajor and we know very, very little about it. We just kept hearing about that damn "Northern Peninsular" whenever they needed the name of some region.
And Troi was a main character in one Star Trek series and appeared in several others, and we know even less about the Betazoids than we know about Bajor.