Ok, I found the bug that makes the player hit the ball even when it goes out.
I'm going to look for favoring the FH Smash over the BH Smash (it's already the case, but just a by a tiny bit).
About not hitting the ball once the point is over, I'm not sure why it's so perturbing... Usually, you should see the ball is out & hear the call... There's only the case when you hit the ball exactly on 2nd bounce that should be unclear...

Anyway, I can turn it off for online doubles, almost no one plays them except the people who expressed their view just now...
