Seeing they got knocked out the champions league mainly because of him what makes you think he won't be the guy to take them to the next level. I genuinely believe he can be the difference in them winning the champions league which seems to be their main priority and the basis for the transfer
Mainly because of him, i.e. once. Pretty Certain English teams have knocked them out on a regular basis.
They haven't passed the Quarter Finals in 5 attempts, Neymar ain't gonna suddenly turn them into winners. Purely a statement signing.