When Manning first came in he did a good job of getting us organised defensively and he did just enough to keep us up, but he didn't exactly turn us on our head. If we're comparing Buckingham to Manning then I think it's important to remember that the first few months of Manning were hardly revolutionary football. He simply took an underperforming team and made things simpler from the starting point of trying not to concede so many.
It still took us until the end of April to beat an absolutely shite Forest Green to confirm our survival. Then he did his best work over the summer alongside Waldron to start to patch our squad back together, but it was always going to be an unfinished job because of the contracts we're weighed down with until this summer. For what it's worth, I think we would've run out of steam through the winter fixture pile up had Manning stayed as our squad depth and lack of options were exposed, maybe not to the same extent we are seeing under Buckingham but then Des did have to come in and pick up the pieces after Manning left us in the lurch.
It's worthwhile mentioning that Manning also had Hogg from day one, who was always singing off the same hymn sheet but also there to take the load off, making it much easier for Manning to focus on the bread and butter of management.
The leadership at our club deserve credit for the ambition and speed in bringing Buckingham in, but in my eyes they have hung him out to dry since appointing him. The Assistant Manager fiasco is inexcusable, and although Buckingham should be held to account for matters on the pitch, I can't help but think he's been totally stitched up and a more pertinent question should be asking if he's been given the best opportunity to succeed. It's my understanding that he has been working very hard since he arrived, but he has been having to do things like chase up contracts for support staff, rather than be left to focus solely on first team squad matters.
I think it's also important to note that City group graduates are likely to be the sorts with a clear idea of how to play. 'This is my idea and what I want to build', rather than the type to come in and rouse a squad into a shorter term pick up. With Manning, we saw what he could do with one transfer window. Things were considerably better after he had time and an opportunity to put a stamp on things. I strongly suspect we'll see the best of what Des can achieve next season, which feels like a waste of the position we find ourselves in now, but for me the main reasons things are dropping off are matters mostly outside of Buckingham's control (lack of support staff and unbalanced and incomplete squad). What he really needs is the support of those above him (I'm looking at you, Tim) in order to give him the structures he needs off the pitch to be the best he can be.