Or 4-3-3 like West Ham and qualify for Europe with less superior players.
Or 4-3-3 like Newcastle who were 10 points behind us and finished 10 points ahead of us using a stable system not flip flopping between 4 or 5 formations like we did, including this 5-2-3 most. Their squad is a similar level as ours.
Or like Brentford when it looked like they were going down, went to a 4-3-3 rose up the league.
Or 4-2-3-1 like Arsenal
Or 4-2-3-1 like Leicester
Or 4-3-3 and be hard to beat like Palace
The majority of our points (65%, 13 points from 20) came from playing a back 4, I just want enough points to not be involved in anything like last season then experiment with your long term philosophy, we were consistently a top half team until last season using 4-3-3 or 4-2-3-1, the only thing that has changed is a toxic kopite manager and 2 managers who favour this 5-2-3.
I will also add that as defensive as Allardyce was he never even went to 5 at the back.
West Ham's midfielders are far superior to ours, which takes pressure off their defence.
Newcastle signed Guimaraes who has been excellent, and unearthed a random midfield gem in Joelinton. Again, their CM energy helped them cope with having 4 at the back.
Brentford's amazing resurgence happened to coincide with them signing one of the best playmakers the league has ever seen. You seem to have overlooked that.
Arsenal have far better players than us.
Leicester have far better midfielders than us.
Palace had Gallagher in their CM last season and a very energetic forward line.
Wolves had an upturn in fortunes after switching to a 5. Chelsea won the league after doing so under Conte.
We have crap players and have had a succession of crap managers. If we struggle, I highly doubt it'll be down to the formation.