Firing Doc didn't address their problems and doesn't help any other than maybe trying to convince Harden to stay. So maybe that's their short term plan, convince Harden to stick around and then if he does, see if you can move Maxey and Harris for another star.
In the end, they shouldn't have panicked, they got the best team in their conference, maybe best in the league, to game 7 despite their MVP hobbled throughout the series.