If one doesn't know who the senior developers are yet, she should think twice about whether she's ready to PEP anything. That's not a litmus test; some PEPs have eventually succeeded though the proponent was new to the project development process. But it's a lot less painful if you can tell who's likely to be able to sway the whole project one way or the other.
I think that entire paragraph made it sound even worse than what I wrote originally. It reads to an outsider as “if you don’t know what’s wrong I’m not going to tell you”.
And as a matter of improving your proposal, who surely does know more about what your proposal implies for the implementation than you do, so you should strongly consider whether *you* are the one who's missing something when you disagree with them.
Is this me specifically or “you” in the abstract? English isn’t great here. I personally supplied a complete implementation so don’t see how this applies to me? / Anders