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

Murena ? as the murena foundation that develop /e/OS ? If yes, their OS is based on LineageOS microG edition with a great ad/tracker blocker and an app store that is kind of a fusion between the aurora store and fdroid (without the ability to add repositories unfortunately, in the version I used at least).

So you can install whatever apps you want with it(Except maybe android auto, I guess). I had my banking app and it worked well (until it detected I was root).

I used it with my oneplus 7, It had some big trouble these last months as their servers were outdated and they needed to update their whole infrastructure. Now, everything seems to be back to normal.

I can not say for their phones (murena 1 and 2), but their OS is solid to me.

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.