I was calling for them to play 3 at the back since the restart (honest), and they've at least looked better defensively since doing that.
Still don't get why they play Auba as a LWF though. Yes he's their best player out there but he's also their best CF, and when they are chasing a game he then seems to drop back down the flank to try and get involved in the build up more even though passing is really not his strength.
Think they should play a 3-5-2 rather than a 3-4-3, but ideally they need a new CB, at least a couple of new CMs/AMs, and pray that Aubameyang signs a new deal to have any hope of getting near the top 4 next season.
GK (both are pretty good)
RCB - doesn't really matter, they're all shite but you need one of them to play to cover for Luiz's brainfarts
CB - Luiz (the only CB that can pass)
LCB - Tierney (not really good enough going forward to play LWB but can defend well enough to play as a LCB)
RWB/RW - doesn't really matter, Bellerin is still alright and Cedric seems surprisingly also half decent
LWB/LWF - Saka - shown he is great going forward and with Tierney behind him he can play more like a LWF
RCM - Maitland Niles - not ideal, but shown he can defend well against City and would give them plenty of energy in the middle
LCM - Probably Xhaka, as at least he is better than Torreira
CM/AM - Probably Ceballos (would be Ozil if he was up for it) but he would be better suited to LCM to replace Xhaka and replaced with a better AM
ST - Auba
ST - Lacazette
Pepe isn't really needed as he's such a one dimensional player. Torreira likewise. At least they do have some reasonably bright attacking talents in Martinelli, Nelson & Nketiah who
could be good enough to step up once Auba + Laca are past it.
(fyi my partner is an Arsenal fan so I watch an unreasonable amount of them so like to think I have a reasonably formed opinion of their squad
)