It doesn't really matter how good he is again he'll be out of contract next summer, he's definitely not good enough for us to have that cloud hanging over our heads for another season
Ndombele would probably be too expensive but I'd actually look to strengthen other positions as Ramsey isn't exactly a classic midfielder in his positioning and attacking verve. We should see if Juventus would consider offloading Costa or even Dybala, they've spent like 200m on Ronaldo Costa and Cancelo while having no one outgoing to offset that financial loss. They have enough firepower as is to win the league even with one of them leaving and they usually don't keep players when they consider moving which one or two of them probably would if we tried
Özil Aubameyang Lacazette Costa/Dybala would be good enough to win the league even if everyone else would just stay back and defend. Make it happen Raul Sven or whoever