When you're fighting for a spot in a team like Juventus, you don't just slow down. I doubt it Gio is so naive to just think a first team spot will just come to him out of nowhere.
He has tough competition and the position we've been playing him at, Diego's role, might have the toughest competition of them all and isn't even the right position for him.
I'd really like to see him next to, or infront of, Diego and just playing 1 striker, like some have already suggested. That could work for him, he'd really take DP's role. It might be a good idea to have a more creative player next to a proper finisher like Trez instead of 2 strikers who see nothing but the goal.