Extremely limited player....haha what a joke pundit you would be.I don't want to sell him, cos you never know what the money will get you in return. E.g. Bale, Eriksen, Dembele, Walker etc. So we should secure the succession before we consider selling him.
On the other hand, Son is an extremely limited player, he scores goals but he doesn't wear a defence down the way Mane, Sterling (when he wasn't so shit), Sane etc. do. So it's not like an upgrade isn't possible.