From that point, Sirtis decided to make Troi's accent sound Eastern-European,
with the idea that that's where Troi's father was from, hence where she picked up the accent.
Hence, in season three, the uniforms were switched to being two-piece, less form fitting,
and made of wool(obviously Counselor Troi still often wore tight Spandex,
thankfully, as did many other guest cast members).
Further, the character of Counselor Troi was actually going to be gotten
rid of after the first season, but when Denise Crosby asked out of the show and Gates McFadden also left, they decided to keep Troi around, rather than get rid of another female cast member.