The problem with DBus is that it's been around for ages now and still most developers say they support it because they have to, not because they like it. Basically, it's not going to get much better than it already is, or by now it would have.
Providing an easy-to-use interface is the job of D-Bus client libraries, not the protocol itself. Client libraries are still a wild frontier, not at all settled.
I thought sd-bus was considered a good D-Bus client library? Haven't had the need to try it out myself, but the name has been popping up recently when dbus has been discussed.
ITts a lot better. I've ported libdbus-1 code to sd-bus and in practise I saw 100s of lines are replaced by about 20, with better error reporting on top of it.
