I just learned of those patches from the link listed earlier in this thread. I haven't tried the "Progweed" build.
Note Progweed's discussion starting with Post #22. It seems the font improvement patch is automatically included in any version after Rockbox 3.8. I guess it isn't a patch any longer. In post #34 he has some utility for anti-aliasing windows fonts. I guess the font improvement is about anti-aliasing but I haven't looking into it more than that thread.
He lists the database fix patch here:
I guess it is mostly for problems with the Clip+.
One person seems to be using it for the Fuze v2 so maybe there is an issue on the fuze too but it may mess up the MicroSD function a bit.
More discussion here:
He also lists a better Meier crossfeed v2 patch here:
There's also supposed to be a Meier crossfeed v3 patch.
I don't use crossfeed but those could be interesting.
And then there's a the silly Doom scrollwheel patch which is totally irrelevant to me but maybe you'd like it.
It's nice you have taken the time to learn to roll your own rockbox build. Then you can make your own current version of Rockbox with whatever patches you want.
I'll need to learn to do that one day!