probably, but he also needs his sharingan to cast infinite tsukyomi on the moon after becoming the 10tails jinchuriki. as far as we've seen rinnegan hasn't casted genjutsu out of it like sharingan has, not saying it can't but so far it hasn't.
"There was a lot of risk involved...I had to use a lot of the tailed beast's chakra within the statue to make this many"
he used the chakra from the sealed beasts to make them but they are still in the statue in a weakened form, the zetsu army won't disappear if he put the beasts in the old hosts, he probably won't do that anyway because then they'd have to reseal them all over again to make the 10tails
i don't think the new 6 paths have MS, they are probably just spare sharingan from his lab, unless he had some with unique powers like shisui had they probably won't be anything special