The signature and the random updates issues can be solved (partially) by using the izzyondroid repo. A lot of the applications on fdroid are on it. It compiles from sources, doesn’t change signatures, and fetch updates on a daily basis.

It doesn’t solve all the issues, but it can help

Mull has been discontinued in December 2024. Ironfox is a fork of it.

I like /e/OS, but the app lounge bothers me a lot. There is no uninstall button and it is not possible to add Fdroid repos… So I have Fdroid installed in addition to it.

I do not see an added value as if I had the aurora store installed + Fdroid.

IMO, the best addition of e/OS compared to lineage is clearly the tracker /ad blocker app.