I think Pogba's desires (play 1st team football and be suitably compensated for it) are just not achievable at our club right now, hence the step down to Juventus (it is a step down as Serie A is poor and Juve not what they once were).
I can understand it from his point of view .... more money, more exposure and a club from from which to launch his career earlier than he could than from Manchester United.
Its a lose for us but good for him. And Im OK with that. If we desperately wanted him, we would have done what was required. SAF obviously has other plans. He always does.
Trust the manager - will be interesting to see what happens in the summer.