Upgrade on Gundo? The disrespect on this site just never stops.
I think he would be an upgrade. Not straight away, but I think there's a limit to how much Gundogan can improve in the 6 role. He will never be faster, never be aggressive in the tackle. He can improve other parts of his game so he doesn't need to make covering tackles or get stuck in, but eventually there will be a moment when he's found wanting.
Aouar has a Bernardo/Foden-esque natural aggression, he snaps at people, he's fast and covers ground, he goes into tackles with the kind of aggression you need when it's one of those occassions where the man has to come down regardless of if the tackle ends up being legal or not.
But on top of all that, he's an incredible 8, he has wonderful passing range, goal threat and control.
I really like Gundo - partly because I think he gets unfair amounts of stick - but I think there is a limiting factor to him at 6 and honestly I'm not a huge fan of him as an 8 - most of his invisible/bad games for us are when he's replacing KDB or Silva.
I'm glad he looks like staying, but if we buy someone like Rodri this season I don't see any game where he'd play unless there's injuries. That's presumably one of the reasons he's not signed yet.