I do think it's a potential problem position for us next season. Personally, I would go all out for Eze in the summer, and have him coming in from the left.
I think that is the best possible signing we could make.
In fact, I have no idea why we wouldn't do this deal considering we've been trying to sign him for years.
His ability is exactly what we need coming in from the left.
It's the signing we should have made last summer. Him or Grealish on the left would improve us instantly. By no means the answer to all of our problems, but both proven Premier League quality.