Naruto Shippuuden Episode 96

[Abdula]

That's a terrible example that proves RZ point rather than disproving it since it's 3 poorly balanced ninjas with huge weaknesses grouped together to make up for their weaknesses.

I agree that wasn't a very good example but it doesn't prove RZ's point at all. What RZ said was that the clans are far too arrogant to even acknowledge their own weaknesses and here we have an example of just the opposite. Three clans who are well aware of their own weaknesses and work together to make up for them.

They work because of group makeup, not because any of them has worked on secondary skills to remove their own weaknesses.

I'm not sure what you're trying to say here. Can you clariry?

Except that no character in the series does that in the NON-filler episodes, not just in the fillers. Characters strengths get stronger, and their weaknesses become even more pronounced as the series progresses.

There is a shred of truth in that statement but come on, you're generalizing way too much. What do you mean no character in the series does that? That is just completely untrue and as far as strengths and weaknesses go I would argue that the stronger a character gets the less pronounced their weaknesses are. The only time we really notice a characters weaknesses is if they are fighting a stronger opponent that is good enough or skilled enough to be able to exploit their weaknesses, if not just overpower them completely.