I'm hoping Jorginho isn't going to be a mistake.
In his early years, Arteta tried to look at experience while managing a dysfunctional team. Hello krusty the clown, willian (both being similar Chelsea rejects), pablo and i've no idea who vetted runnarson. It's a reminder that not everything Arteta did was perfect and he made several mistakes in that formative period.
On paper, Jorginho makes sense, cos he has experience, can easily slot into the and he didn't cost an arm and a leg. I also think trossard is a good buy, considering he knows he needs to be competitive to compete with Martinelli, Saka and possibly odegaard. His versatility could also work if (i hope it doesn't happen) if something happens to Nketiah.
Though, i'm slightly concerned on the issue of addressing squad depth.
if there was a depth issue, why loan out Lokonga. Elneny is supposed to be back up to Partey (yeah not much of a backup.) So Jorg comes in for Elneny. We still needed sambi around in case anything happens to Xhaka. Zinc might work there as one more stop gap. But just makes it feel like the team is still light in the central area.