The question is, is he better than Firpo, Umtiti and Lenglet? I would resoundingly say yes.
Because he can play back centre in a defensive two or trio, as well as LB and left wingback. Extremely versatile, he likes to be in midfield too but doesn't excel there.
I don't have a problem with this if it is the right price. If we sell/off-load Firpo, Umtiti, Lenglet and get Alaba and Eric Garcia for free then we have improved both the centrebacks and the backup LB/WBL.
Aren't there rumours that he wants 10m net a year? That's steep af. Don't think it's good business giving a defender this kind of cash. Hell, don't think we can give anyone this much w/o shedding serious salary first.
There will be a lot of transfer rumors the next few days. Some strange and some exciting names. The media is gonna go full overdrive into a frenzy which will probably lead to some excitement, some people being worried, others being angry.
Unpopular opinion: Lenglet is not a worse CB than Alaba (when in form and seeing this season as an accident).
You can always make it a numbers game though (selling Lenglet for 40ME? Alaba on a free etc pp). But generally another "old" player on high wages is a no for me.