If it's any consolation, I've been finding in my creative stuff that in the process of making things I often find better practices for how to make stuff while I am in the middle of the thing? I think it is a good thing to look at a released project and make notes of the improvements to be made, whether for future things or a refined version.
I'm always on the lookout for sound libraries, so if you release updates or a version 2, or other libraries / sound assets, I'd definitely give them a look!