The difference is that we have a very good squad for this league, so you don't need as good as manager to turn things around. In the PL we would have needed a pochettino-esque replacement.
Whereas now we just need someone half decent and they could get us up. The fact Martin got us promoted last time should prove that.
I will be honest with you, I dont think we have a 'very good' squad.
We have the odd promotion worthy player and we certainly don't have the '21st' best squad on paper, but there are whole areas that aren't promotion quality and there could be a case for us having the worst striker situation in the league, it is definitely weaker than the side RM had.
Goalkeepers - McCarthy and Bazunu are mediocre.
Centre Back - Our defence was pretty poor when we got promoted last time anyway and now it is down Bednarek. Stephens is done, THB is overrated as they come and has always looked error prone with a strop problem, Wood and Edwards at best have been mid table Championship, Quarshie is very hit and miss so far.
Full Backs/ Wing Backs - Manning and Roerslev in fairness have promotion experience, but being down a KWP on last time is a massive downgrade. Welington offers nothing. Jelert is still slightly unknown.
Central Mid - Charles, Downes and Jander seems reasonable tbf.
Attacking Mid / Wingers - This is the one area where I would say we are actually overflowing with potential and they have been creating plenty of chances, but that means nothing without.....
Strikers - Someone needs sacking for this. Who looked at Stewart, Archer and Downs and thought 'that'll do'. Archer is nowhere near as good as people sometimes claim either. He had an 18 month purple patch three years ago. Looked off it at Sheffield United and then has never really looked good enough here under multiple managers. He was third choice behind Stewart and Onuachu by the end of last season for a reason.
The lack of strikers and mediocre goalkeepers and defence make this a mid table side at best for me. No point having a bucket full of decent attacking midfielders when they have no striker to work with and an unreliable back line behind them.