Think some of you are giving the players way too much credit. Some of them are just poor.
Xhaka - could be better under a new manager, was better before and need to see if it was just the system not suiting him or the league.
Ramsey - could get better under a new manager that is more strict with him.
Bellerin - could get better under a new manager that provides him with competition and defensive coaching.
Ozil - could get better under a new manager that is more strict with him.
Iwobi - could get better with a loan and/or someone defining his position, working with him on end product.
Wilshere, Mustafi, Welbeck, Ospina, Cech are all unlikely to be any better with a new manager imo, Cech maybe if we start playing defensive but that's more masking his weaknesses. Wilshere's main issue is injuries, they appear to have ruined him now and he's not shown enough over the last few years to even justify another chance. As much as I dislike the c***, at least Ramsey has offered something to suggest he could be useful.
Again, Mustafi might benefit a bit from playing in a more strict regime but still think his brain farts are just too natural to curb. Welbeck - clearly has his uses as a defensive forward but why do we need that.
We can't waste 100k pw on the hope he might get better, signs are that he's more likely to get injured. Spend that 100k pw on someone we know for sure is good.