I don't see any problem with shadowing your partner when they are trying to play a tough overhead. Personally I find it easy to stay close enough to reach it if they miss, but far away enough not to be in their way. I also don't have trouble getting back into position.
The racquet clash, while not ideal, is better than neither taking the ball. Those balls are always a challenge because the ball is on you so quickly. Generally, I play that the cross court player takes it, but YMMV.