Disruption is a combination of incoming & outcoming ball. Yes of course any ball with disruption can be returned but it's very difficult do a strong top spin or drive / smash due to the fact the ball trajectory isn't straight, tha ball goes stumbling as snake.....
Can be, No I don't think so, I believe his mind is out from Barça also don't help be the captain of the team because adds him responsability, simply I guess he's not confortable with the situation: he don't want to play with Barça.
Several advices how to use the LP for a push-blocker:
1-Keep the wrist relaxed to absorb all the energy, if enough you can move the hand to your body to tame the speed.
2-Always bend your pips.
3-The best way to return pushes is bending the pips sideways so you return the ball with a lot of...
All push-blocker are looking for the Holy Grail LP, as all doesn't exist, look for the LP that can control & step & step, little by little you can manage the best ones as inverted: training, training, training....
Good LP don't chop a push because knows he's doing top spin so easy to attack for the opponent also don't return high balls. With push-blocker you don't have time to react, I guess you'r referring to classical long distance choper that's not the case.