Do you know he is still the fastest player in PL?Walker is a good RB, mostly on defense. His offensive skills aren't world class; on defense he relies often on his pace, which given his age (33) is going to be worse and worse in coming seasons.
If Walker leaves, I wish him well. We'll easily find a replacement.
Have you seen Mbappe, Vinicius, and other top wingers become useless against him just recently?
Now please find a replacement for that, and when you say "easily", do you mean the replacement could be around $20M-$50M?