This is how we do things at my work - juniors can review senior dev's pull requests. It helps to break down walls and prevent authority from piling up.
We've just started doing this as well. Seems to get a bit competitive at times though.
I'm experiencing the same thing, but I think its worth it.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.