Obito had trouble controlling 1. Sasuke's rinnegan will a completely different story. Sarada is the closest to pure Uzumaki and in combination to her uchiha dna she would be the better choice. Even that might not be enough.
Besides, if anyone us getting it, it would logically be sarada. She already has the sharingan, and sasuke would want to keep it in the family(if he ever decided to pass it on).
On the other hand, his rinnegan is the only thing that can summon the gedo mazo. So it's too dangerous to leave behind. He will probably choose to seal it away before his death or destroy it even.