I can't say I disagree. I think that is what he is used to at City where they have 2 specialists in each position. I don't think we have the resources to build a squad like that though. My preference is maybe a couple of specialists in key positions and then a handful of versatile players. I think we have certainly suffered from only having one right back (Bellerin) and one defensive midfielder (Torreira) this season for example.
We can build for two in each position. I think competition for places is something Arteta uses as a tool to pick his teams.
Players we have to sell based on contracts or quality:
Auba, Özil,Mustafi, Sokratis, Luiz, Elneny
Players I don't think Arteta fancies:
Guendouzi, Torreira, Kolasinac, Xhaka, Holding. AMN could be on the list too.
Gk: Leno, Martinez, ?????????
CB: Saliba, Holding
CB: ???????, Mari
RB: Bellerin, ?????
LB: Tierney, ??????
DM: ???????, Torreira
CM: ???????, Guendouzi
AM: ???????, Willock
RW: Pepe, Nelson
LW: Saka, Martinelli
ST: ???????, Lacazette, Nketiah
I think we will try and shift Xhaka and Kola and keep Gueneouzi and Torreira but not use them as main players.
Gk: I'd buy a young goalkeeper. We have been on the lookout so buying one and sending him out on loan is a good start.
Lb and rb: We need to find a young left back to compete with Tierney and the same for Bellerin.
Cb: I'm more willing to stick with Mari due to his age and left footedness. However a first team signing is needed in this position. I'd be happy with any one of Gabriel, Upamecano and Tah in that order of preference.
Dm: Gueye seems like the best bet.
Cm: important position. Do we go for a passer or athleticism? Well we have passers and struggle to progress the ball due to their athleticism.
Partey and Zakaria are the kind of midfielder we need but probably too expensive. Sangare is the next best thing. I think you then sell one of AMN and Torreira. Probably Torreira and you have Sangare, Gueye, Guendouzi and AMN as your options. Drop the cash on Bellingham, loan him back and sell Guendouzi the following summer.
AM: Jonathan David seems like a good fit.
Cf: Edouard for me. Good in the air, able to finish off both feet, good dribbler and can link play.
Gk, Rb,lb, Mari, Gabriel, Sangare,Gueye, Bellingham, David, Edouard.