Nice list!
I personally stopped finding the combined season teams any "enjoyable", I prefer them to be single season as for example I don't like to have Brando and Roberto Carlos on the same Brazil 1994/2002 jersey, so my personal take on this would be that you either pick one season from that Arsenal (Preferably, the one you have more refined stats available) and include the City squad, but do whatever you can/find easier.
I miss Romania/Portugal 2000 among the "England Greatest rivals", they did dirty to them on that Euro

, if I have to take out one team, it would be Argentina 1962.
I would have expected that in the "Premier League Era 2010's - Present" section, you would have added as priority all the English clubs that reached a major European final, guess you didn't want to fill it with Liverpools

The ??????????? team on the "Premier League Era 2010's - Present" which teams you have in mind to add? If you can't find a relevant club, then make it fictional, like
"PFA Team of the Decade 2010-2020/PFA Team of the Year (2010s)".
Other thing, this is PC only?
EDIT
PFA team of the decade 2010-2020, my personal 22-man roster based on appearances:
De Gea
Hart
Kompany
Cahill
Walker
Vertonghen
Baines
Rose
Ivanović
Bale
Yaya Touré
Hazard
Dele Alli
Silva
Kanté
De Bruyne
Kane
Agüero
Mané
Van Persie
Rooney
Vardy