Exactly! We need to let go of this romantic idea of possession for possessions own sake. Possession doesn't win matches if 90% of it is sideways passing just to maintain "control", and after a game where you've had 1 shot on target you say: "we dominated the game but the ball just wouldn't go in, it wasn't meant to be". Like Bayern Munchen talked after the game last night... Possession doesn't equal dominance!
In this way, Tata Martino at least had the right idea when he came to Barcelona. We need to sacrifice some "control" and start to actually play attacking football again. This doesn't mean giving up tiki-taka as our style, far from it - and that's where Martino went wrong. He thought that verticality mainly entails long balls and crosses. Far from it, just watch our games from 2009.