No I just think they can't be faster and stronger than before just because of useing sharingan linking. That what make sense to me. I am talking just about the sharingan, rinnegan is working like this I know but Im confused about why would sharingan can be linked to many users like rinnegan. So some of you mentioned two solutions:if you are saying that their eyes have been implanted into them you are wrong because as you know that all six paths of pain didn't have transplanted eyes but they did have rinnegan,this is because they have chakra receivers in them which allow them to use rinnegan and this same goes for tobi and the six jinchrikis.
1. Sharingan are Implants
2. Linking through controlling (e.g. like Sasuke controlled oros snake)
But I think after some discussions here there is no way theyve become faster and stronger just through sharingan linkin / controlling. Thats why I said Ive been convinced xD