Honestly, the worst thing you can do as a "big club" that is struggling is to give your top flair players big new contracts. It almost never works out. Auba has been disinterested and quite poor since singing a new contract and he isn't a leader of the team in any way. If anything, that has had a negative effect on the team. There are top players who are driven to win at all costs (Ronaldo etc) and there are top players who need a top team around them and the lure of trophies to drive them. Auba is definitely in the latter category. Hes a Pogba. You could pay those type of players 1m/week and it wouldn't buy you form.