Crosby as Troi is an interesting idea, though with how disenfranchised she became of the show and the fact that the writers didn't include Troi in three consecutive episodes in S1, it's likely the character would've been killed off.
Actually read that the episode Haven, in which Troi almost married and left the show was pushed back as they decided whether or not to keep Troi, as it would be an adequate exit for the character.
So Crosby!Troi would have likely married Wyatt.