That looks like a great team when you leave their defense out of the lineup
Defense is a huge concern. Moving forward we should keep:
CB - Sokratis, Holding (ACL), Saliba (next season)
RB - Bellerin (ACL), AMN (back-up)
LB - Kolasinac (back-up), Monreal (back-up)
The problem with that list above is that two of our prime aged better players (as in they will be here for years) are coming back from ACL's, and we can't afford to be relying on them so heavily this season - it's unfair on both of them. Generally it takes two years to get back to your best after an ACL too.
Chambers will be given this season to prove his worth. He was very good last season out on loan but played as a DM the majority of the time (I think?). He can settle in for a back-up role and I'd be comfortable with that.
If not for Koscielny wanting to go back to France I'd be happy with him for another season. But he's been one of our PL greats and given us everything, so I hope he gets his move home.
Hopefully we sign Tierney who will come in and be our starting LB.