you are correct on 2 and three atm. But I've given each new MythTV release a chance, and always had way worse artefacts / restarts than with VDR. I do not know, how long it will take to give VDR the same kind of loving and caring within LinuxMCE, but eventually, it will be. And the biggest advantage of VDR is, that it is WAY slimmer than MythTV.
VDR is very much a manual setup atm with LinuxMCE, but that is fine with me, as the end result is what counts for me.