Arch update broke stuff - new gnome-flashback

[sukulent]

Hello, I have made the funny mistake of updating my arch system and many things happened.

Firstly, the update froze the system before the hooks could run, after hard reboot I surprisingly got to lightdm but after login the console appeared briefly and back was the lightdm login screen. Then I made sure that the hooks ran and everything was updated, that I had the proper intel & nvidia graphics drivers (optimus laptop shenanigans), there were no glowing errors in the logs, but still after reboot I got the same login loop.

After bit of digging trough logs, I found the .xsession-errors file and there gnome-session-binary complained that the --builtin option is unknown, so I tried removing it and now I am able to log in.

I searched a bit and from what I understand, the --builtin is 'inverse' of --systemd, it seems like the old version of regolith uses some old system which got removed from new gnome. (Here is the update which removed --builtin lol)

This means that some things are not working, I noticed:

• dunst doesn't get any notifications
• mouse/touchpad settings got reset and settings in gnome-settings don't do anything (tho turning off wifi does correspond with output of nmcli r w)
• desktop background is just plain black
• sometimes tray icons show up, sometimes don't, not sure what causes that

I guess that the proper way to fix this is to upgrade to regolith 3, if that supports the new gnome.
I understand that you might not have time, I am playing with the thought of trying it myself. I am studying university so my time is problematic, but I really like regolith and minting similar i3 setup seems harder.
Of course there's the option of reverting to older version of gnome-flashback, but I'm not sure how well and for how long would that work.

So I guess I ask: Are my deductions/assumptions correct? And in what state is the project?
Thanks.