On reflection my view is the following, and for the record I'm not an advocate of sacking.
I never liked Pulis, but what he did and got out of the initial promotion team was genius. However at the end of his tenure, having spent and mis-spent significant amounts of money, the results didn't justify the inputs. He then got a season to put it right, which he arguably did everything he could to fight change. His departure was the right time, but I don't think Coates wanted to sack him, it was simply TP's God complex that made it untenable.
Fast forward Hughes, not my choice. Never committed to a club or proved consistency over a decent period - like I said above - TP was not planned as a sacking and Hughes was a forced decision.
Enter stage left. Hughes makes positive changes, spends some decent money making good and bad buys. Style changes and the results gets better with our best ever finishes justifying the man and the money - happy days.
After a positive start and a decent run in the 2016 season, the club were presented with a golden opportunity to have a legendary one of season of a life time AKA Leicester. We failed in that challenge which is acceptable in isolation. Whilst there were issues at hand, and the squad balance being called into question, Hughes deserved the opportunity to rectify the blip.
This season is factually the worst, but more importantly it's what's going on, on the pitch that is the issue - very similar to TP's final year. There seems no clear vision of tactics and apathetic under performing talent on the pitch and talent off the pitch being wasted or not wanted - hard to justify when your not getting the results.
Hughes has had his time, whether that justifies a sacking - I don't know? What I can say is that the club is not in a position to plan a change and that is negligent, and gets clubs relegated. If a change were to be made, it had to be now with a full summer for a new manager.
The biggest rule in business is never not make a decision. If you make a wrong one for the right reasons, so be it, but never hesitate and dither.