After Unsworth stumbled on a midfield grouping that worked, keeping us up was a pretty straightforward task.
With Gana/Davies/Rooney doing a solid job in the middle, we could have gotten roughly the same results for the rest of the season using Lennon/Lookman/Vlasic on the right and Calvert-Lewin at CF.
Instead, we brought in Allardyce to fuck around with the midfield (how many Gana/Schneiderlin minutes do Everton managers need to see before they stop trying it?) and spend a bunch of money on players who didn't really move the needle for us long-term.
It was all panic-driven and it's costing us opportunities to add to our squad now.
To clarify -- Unsworth had to go (he was all over the place tactically, it was horrifying, and there was no guarantee that he would have stuck with what he stumbled on against West Ham) but the fact that we paid Allardyce a ton of money to throw that blueprint away after a couple of matches (leading to dire performances) and let him add new players to a squad that didn't need them was incredibly wasteful.