I don't even understand what's being complained about here. If you want a % in a Uri you need to encode it. It's not rocket science

Except that % is already used to encode something else.

Now if someone else a URI, is there going to be any confusion on how many times a URI needs to be decoded?

If the answer is yes, then we have a problem.

(and by looking at the other comments in this thread, the answer is most definitely yes)