Would it be possible to add the option of deleting or at least editing a request change made in the User CP?

I made a mistake and requested to change a release date from today to the blog's release date instead of the actual release date which was a good 2 months ago. I can add another request change, but I'm sure that might annoy one of the admins who do the changes.

If that is not possible, how about just allowing editors to edit release dates ourselves?

Only admins can edit any part of a release. That's never gonna change. Just submit another change request

A just ruler amongst tyrants