We had Auba at the same age on a similar salary, ofc the last big contract is going to be a big one. You think a 28yr old Fernandes will renew for the same wage in 2-3 years when it comes to renew?
I also wouldn't be surprised if he demands a lot more than that now. His agent will have done a shit job if he accepts 200k from the club that gave Sanchez 450k, De Gea 350k, Pogba 300k and Martial 250k when he's well clear in terms of ability.