I don't think that in the B5 universe there is such a thing as a uninhabited habitable planet.If it's habitable there must be life there.Even if it's not sentient life the telepaths can't simply move there because they will interfere with the evolution on this planet.
I always kind of assumed that the telepaths asking for a homeworld of their own wasn't that big a deal, surely there'd be lots of planets they could have ... But Sheridan's reaction in this episode, and the discussion upthread makes me now doubt that. Perhaps there aren't all THAT many planets?
Centauri teeps didn't seem all that empowered but then, we only saw Centauri lady-teeps, and Centauri women didn't look very strong, in a social authority kind of way. We never see Centauri woman ministers, for example. So maybe those teeps weren't an aberration but a relative norm?.
It's funny (and not funny ha-ha as you well understand) that one of the most memorable and poignant lines in this episode is a seemingly vapid "We are well beyond pastels now". Now, THAT'S great writing.