He could be useful, sure, you never know now. But right now, he is too big a gamble to play with, his fat manager will make sure he gets a new fat contract to stay at United and then we will be back in that circle.You never know, ETH might think he can use Pogba effectively but its simply not worth the risk of giving him a pay increase and a long term deal if there is even a remote chance he won't fit into a new system and team that ETH wants to build.
I would be tempted to just tell ETH that Pogba is gone.
As einstein once said "you can't do the same thing and expect different results". We have to let him go, he hasn't cut it at this club in almost 5 years. This time, we have to be ruthless as a club, we have been lenient for far too long. It's time to let players know that their actions or lack of actions have repercussions now.