Jango, Buzdar was a bad choice and in a province that pushes 54% of Pakistan's revenue, the performance and his governance "paralysis" was a major issue. Your question would be perfectly fine if we were talking of a government that had no dependency on the establishment for policy formulation and strategy. This, fortunately or unfortunately, was not the case with the PTI government. The much talked about "crutch" was exactly this alignment with coalition which kept PTI in power. The establishment had an interest in it continuing and when there was a breakdown in that, among other things, then the establishment too decided to abandon the ship.
As such how the PTI government performed in the nation's largest province and how it handled its relations with its coalition partners were both topics on the table with the establishment.
Those who don't learn from history are doomed to repeat it. I am optimistic but with Pakistan you just never know.