Re: Feedback: You can't give more than 5 ratings to the same user
Create a thread and use it as reference if you have more to say than what fits into the 5 ratings. Keep in mind that multiple ratings from the same person count only as 1 in the score, so 1, 5, or 25 wouldn't make any difference for a casual observer, but if someone wants to read more - they can follow the link.
This is the best solution of it. But yeah personally I don't think it’s a big worth to give someone more than 5 feedbacks. It’s enough to me 
Note: I did not also know that feedbacks also limited, so thanks op for describing about itself.