Naruto with Yang seal:
1. Could in one hand do this:
2. Could transform his TSB to this:
3. Could link his Rasengan with the Bijuus to give it KKG:
Naruto without Yang seal:
1. He needs to use 3 hands yet again:
2. He couldn't use the 3 TSB he had:
3. He never displayed the ability to use KKG at all after that.
Conclusion:
This is proof that Naruto was getting weaker after he lost the Yang seal which contains Hagoromo's chakra that gave him his abilities(RSM).
Or Yang seal gives you the ability to link your self with others to get help with all the 3 abilities.
Or Yang seal is useless and it didn't do anything except healing.
You choose.
1. Could in one hand do this:
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2. Could transform his TSB to this:
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3. Could link his Rasengan with the Bijuus to give it KKG:
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Naruto without Yang seal:
1. He needs to use 3 hands yet again:
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2. He couldn't use the 3 TSB he had:
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3. He never displayed the ability to use KKG at all after that.
Conclusion:
This is proof that Naruto was getting weaker after he lost the Yang seal which contains Hagoromo's chakra that gave him his abilities(RSM).
Or Yang seal gives you the ability to link your self with others to get help with all the 3 abilities.
Or Yang seal is useless and it didn't do anything except healing.
You choose.