Yep, hard to disagree with that. Id say if anything we need a poacher in front of goal.
In my honest opinion, the last thing we need is a specialist player who contributes fuck all in general play and doesn't offer much/anything outside his specialist area.
Besides, we've already kind of got one of those with Carroll. Despite his play today his finishing isn't all that bad, it's the rest of his play that's an issue, and that would be exactly the same with a Hernandez - type. The latter doesn't start all that often for Utd either. It's a nice option to have, don't get me wrong, but not one to go for when there are glaring holes elsewhere.
We need a better striker, or for Carroll to improve dramatically, another winger and a defensive midfielder before we even think about a nice option player like that, in my view.