Why on earth not?
Cooper is a young up coming manager. If Swansea miss out on Promotion then it would alert a lot of clubs. Done well at Swansea.....better than Potter some would say, has connections with the England set up, been linked to moves to the Premier league, again.....press talk.
Mainly because of style. Have you watched them play?
Why go for Cooper when there is plenty of alternatives in that category of managers - Tony Pulis, Sam Allardyce, Neil Warnock.
Unless TB and DA feel like throwing all the talk about a Brighton way of playing in the bin, there won't be any Steve Cooper at Brighton. Watch any Swansea game or read any match thread on Planet Swans and you might get an idea of why he is not going to manage Brighton. CP is a far more likely destination for him.
If TB would go for another Championship manager in the future, there are lots of more exciting alternatives.