Correct, IMHO, Madge failed to deliver, under his command we even went backwords from where we were under Cleary.
There was a hope that Maguire would further improve our defence, identify the gaps and implement the missing structures, unfortunately he failed. He just played it safe and re-cycled the same (mediocre, hopeless) players. Also, there were rumours that some players left us because of him, and that in general he "lost the locker room".
As we know, doing the same thing over and over again, and expect a different result is the life cycle of a disaster. IMHO, we had to try something different, and Sheens is the only coach that already delivered. With a possible exception of Bellamy, imho, he is our best option to break the downward spiral.