I don't think that TOA will have the effect on RvR that many people think (and some fear). Sure some people will have things others don't but even if you don't have the time to get ML and artifacts you can still bet you'll have fun in RvR.
There will be a gulf, but there has been since the start of the game - those with and those without buffbots, those with 100% fully overcharged items and those without any SC and still using epics (yes there are some of us around - and I'm a LGM SC!). It's just how you see it, I don't think items make you good or bad at RvR they just help even out a shit play with a good one and making that good play excellent.
Always be plenty of crap players around to kill