We're trying to move a lower-mid PL side to upper-mid. It's difficult as we're bumping up against the clubs in European competitions.
Moving a Championship club to safety in the PL has to be more difficult, especially given the current financial regulations.
Not only is your squad full of Championship players, they've likely played a certain way to get out of the Championship that will not work in the PL. They've added to the squads, but they'll still have half their squad either unproven or sometimes worse, players who have proven their ceiling is the Championship.
Perhaps Burnley can keep a compact shape, but does anyone think they'll score enough to stay up? Unlikely. Leeds may score goals, not 90 plus, but will their defensive shape hold? Unlikely. Sunderland is a wildcard, it seems they're brining in talent but I'm not sure it's enough, not only were they far behind the PL clubs, they were pretty far behind the two automatic promotion clubs.
The Championship is one of the top leagues in the world, but I still think there's never been a bigger gap between the PL and Championship as what exists now.