What it desperately needed was more originality. I suppose Zackham thought that if he just got a great cast and sprinkled enough humor into it, then those would be enough to cover up all the flaws in the script. Unfortunately, he was very much mistaken.
Behold the unholy matrimony of hack-job romance and whack-job comedy. Witness the blindingly bleached marriage of house-porn and cocky Caucasian privilege. Suffer the union of former A-list stars and express-cashed paycheques.
This is not so much Meet The Fockers as meet the shockers. The jokes are something old, nothing new, mainly borrowed and sadly blue. De Niro is a shadow of his former shelf, not so much Taxi Driver as taxidermy.
It's not the sheer predictability of the ensuing frolics that's hardest to take, or even the dismal attempts at humour ... but the sheer misery of watching actors you once respected demean themselves in such utterly worthless fodder.