Yeah, I semi-recently had to fork a library, make some big changes to get it working for us, then made an issue with the main repo basically saying "Hey I needed this and don't have time to do it properly, Here is what I did, and I ham-fistedly ripped out everything i'm not using. Look at these few files for an example of the core change that's needed. I'm willing to help work on a real solution later, but I can't right now"

The maintainer saw what I did, and was able to easily make the change so it conformed to their style, their architecture, and they worked with me later so I could make the doc changes.

I felt like that worked magnitudes better than when someone makes a big PR with a potentially controversial change and lets the maintainer decide what to do with it.