Hello, I stumbled upon the same issue and fixed it locally before searching the BTS.
I agree on the change '/var/lib/quassel/** rwkl' (although AA convention seems to be 'rwkl', but that’s just cosmetic), but I would suggest adding '#include <abstractions/dbus-session-strict>' instead of specifying the IDs manually. Said 'abstractions/dbus-session-strict' does not allow access to '@{PROC}/sys/kernel/random/boot_id', but I didn’t get any audit messages about that after including the abstraction. I haven’t looked any further into it, but maybe it isn’t needed? Thanks, qsx