What’s obvious for anyone is that with a single forground app and a single tab the phone becomes warm faster than anyother phone. The best thing to do is to fix this first. From what I’ve seen, Purism has a good priority list regarding the software for L5.
One other thing that I think will make the battery last longer is to reduce the current used when the phone is suspended. We will notice 10-15% battery percent lost during the night instead of 40-50%, and we will feel it during the day too.
These things should be done first because it will affect all users, regardless of their way they are used to launch apps.