You don't need to have mp-fremantle-community-pr in order to have functioning CSSU (any variant). Just mark packages it depends on as installed manually, so they won't get autoremoved.

Not that you have much reasons to keep advanced power monitor over new battery applet, though - especially, if you pair it with bme replacement. Speaking of which, I'll test new applet ASAP and check if it still exhibits the same blocker bugs, then report back

/Estel