that's a bummer that you suffer from this problem even with a real MBPr. You are sure that this is the RTC alarm wake up and not the power nap feature? I'm afraid I can't help you further here since for my hack it works now...
Maybe consider contacting Apple for help/support since you have a brand new machine...?
disabling bonjour/multicast could cause other services like AirDrop/Airplay/etc to stop working afaik. So this 'solution' might not work for people who need those services.
Maybe I would test a little bit longer. I've seen lots of wake reasons for "ARPT network". What surprises me is that I've turned off every possible wake up option in settings. Bummer and it's A real one.