What I'm saying is that Naruto should have kept all the bijuu chakaras instead of losing them (assuming that he lost them).
You are basically focusing on the wrong thing. We can argue whether or not Naruto was nerfed or if that was just the extent of his power until we are blue in the face.
The bottom line is, Kishi shouldn't have taken RSM away from Naruto to begin with. The bijuu chakaras should have remained and been able to replenish itself like chakara normally does. Either that, or the bijuu chakaras shouldn't have been necessary for RSM in the first place.
Also, no Madara would not be too OP. If Kishi just made the heroes stronger and didn't take crap away from people or make things temporary, then Madara's power wouldn't be a problem. He was nerfed too much to begin with.
He was given no unique mangekyou techniques.
He hardly used the rinnegan and used very few techniques of it.
He did almost nothing as the juubi jinchuuriki. He could have easily beaten Guy with limbo, bijuudama, genjutsu, mokuton, etc... Did he use any of that though? No! He just stood there and let Guy beat him up! He didn't even use the truth seeking balls as nearly as well as Obito. Those balls can explode like mini bijuu bombs you know. Did Madara ever make them explode though? No!
Genjutsu is definitely nerfed in almost all of shippuden because it's too OP.
Hell, itachi didn't use genjutsu on kabuto despite being known for using non-eye contact illusions as per Shukaku.
What I meant by the "madara'll be too OP" is, imagine him having amaterasu and tsukuyomi. It'll be devastating when used in succession with wood and perfect susanoo. Though, if he had something similar to blaze release, then he wouldn't be that OP so you've a point.
If you look closely in the panel where gai was twisting space, his gudodamas were getting distorted and teleported away from his proximity.
Limbo's movement capability was stopped by night guy through space manipulation, even madara couldn't moce at that time, how'll his clones then?
Rinnegan abilities are different for every user, Pains abilities are not classified Kekkei Genkai which proves it doesn't stem from the Rinnegan.
The only common ability is CT, ninjutsu absorption along with the traditional perks such as visualizing invisible substances, seeing eight gates chakra nodes, probably precognition(taking into fact Madara never used Sharingan EMS again for CQC fights after gaining Rinnegan) and strong chakra(as the ANBU black op beside Tsunade noted).
These are the traditional perks.
Indeed, cancelling the rules and stuff, if Kishi simply gave them what we thought are "Rinnegan powers" and "if tailed beast chakras refill like normal chakra", then they'd obviously be OP as hell.
But that'd mess with the story-line, it'd mess up the fact, the Bijuu are entities of thier own, they are not integrated into Naruto's body to refill as time passes,
Mental energy is gained through meditation, learning and other experiences, physical energy is fixed and is the cellular energy which exists in almost a trillion cells present in the NV human's bodies as per part 1 explanation.
The tailed beasts should train to earn mental energy to combine with physical to create chakra and if they don't thier chakra gets exhausted.
