Generally speaking, it appears that players will choose a comp based on their effectiveness and utility in performing tank, heal and dps roles despite their aesthetic and/or story preference.
In a game that focuses around the 4th pillar (story), has EA implemented a flexible companion system to support this focus?
Personally speaking, no. I would much rather use certain companions, but don't because they are less effective in the roles I choose for them to perform and that makes me a sad jawa.