Improvements on the bug I reported above after 24.04-1.1:
Sometimes the phone will boot with only one of the 2 sim working or even none of them,
Seems completely solved
"The interface is sometimes kind of sluggish, or will freeze for a fraction of a second" : Has improved significantly with 24.04-1.1. Still not always perfectly fluid, but honestly this is very acceptable, the system is quite fast.
"Gps positioning does not work reliably in webview (in comparison to puremaps)" : There is some improvements with 24.04-1.1, it sometimes works in ideal conditions, but it is still unreliable and will still freeze/crash very easily while it works reliably on Pure-maps.
'It often looses celular data connection.': I'm progressing in the investigation, seems to be an IP loss problem, I might be able to write a script to automatically do dhclient when needed as a temporary workaround. https://forums.ubports.com/topic/11700/bug-data-mobile-interface-looses-ip
Which means we're getting closer and closer to a system perfectly suited to my needs, thank you so much.