Arsenal has a really looong list to send from the team this summer as it seems...
Honestly nearly all of them are really useless for the squad. Trossard can actually be useful as a substitute after revolutionizing the team. He can bring critical points to his team sometimes with his nice individual skills.
This is a good way to raise funds by the way. They spent a lot of money earlier on some solid players such as Rice and so on. Now they should make sure there won't be any issues with FFP too while spending a huge amount on a new striker probably.
Honestly this is quite a lot, and I also share the same sentiment as you here, their are some players in this list that may be very useful to this arsenal team, but if this news is actually true, then they really have to splash the cash also, because they can't let a whole lot of useful players leave the club and not replacing them back, so that's why I believe that they must splash the cash in this summer transfer window if something like this happen, because since they will be going for a more quality players, It would be more expensive compared to how much they will make selling out this players that are no longer needed in the team.
Another department in this arsenal team that seriously needs to be addressed is their striking position, they really need to sign an attacker that would guarantee them 20+ goals a season in other to be able to compete very well for the league title next season, the mistake they made this season should not be repeated, because in my own opinion, that was their greatest failing this season.
If I were an Arsenal fan, I think I'll be in support of clearing lots of those listed players from the squad, apart from Trossard and Partey that are currently usefull to the team I don't think any other players on that list are worth keeping including Zinchenko cause he's become injury prone and useless, Arsenal is a good team they've proved it over the years by finishing as runners up consecutively but then if they want to be champions in the EPL they'll have to take drastic measures by offloading useless players and creating space and capital for new signings, if I were Arteta I'll sell the older ones and loan some few young players on that list with potential then sign quality attackers about 2 with few more defenders, their midfield is solid but one more quality midfielder would add more strength to that area next season, however Arteta's major focus should be signing quality attackers