What message does it send to a team weeks before the playoffs when the coach is still juggling his lines and pairings? And I don't mean a little here and there, but borderline pathologically.
It's not "Oh, he's just trying out different combinations to see what works", it's either "he has no idea what he's doing" or just showing a complete lack of confidence in his team. I'd offer both are true, and the team's play seems to dictate it.
And not that it's all on Keefe, but Dubas making all these moves at the deadline to give the team depth at forward and on the blueline were required because he didn't address those things well enough (really, at all) in the off-season.
Now Keefe is scrambling to try and see how to fit rentals into the lineup, but instead of just going on what should work he seems intent on trying every combination possible for 2 games, then even if it works, rotate everyone again. Crazy.