Although I like the scaling mechanic (more glory for the underdog) and restricting rewards to those actually in the fight, w/specific respect to xrealmers, was the idea of a lockout timer linked to RvR status floated ? I seem to recall hearing it was considered internally.
In AoC, you had a "10 min of non-combat status" lockout on feat spec swapping, and it definitely gave you pause to think on your choices regarding present build; seems like a similar mechanic could discourage opportunist xrealming. Admittedly, ppl would create second accts; but if IP-linked lock on faction was possible, such might not be a circumvention.
Seems like a faction lockout timer (say 30 mins?) based on leaving RvR status (w/tweaks to make sure ppl were not unflagged in RvR areas) would discourage mailboxers (if wc squat was nto valid for rewards) and xrealmers alike, w/o resorting to witch hunts on "is he a mailbox guard or not?" when someone was just organizing storage space due to being too new to realize there is a warehouse in the IC, or not wanting to spend the money and time to go there. The GM judgement calls on mailboxers alone would be neverending and, most likely, often completely ad hoc. What if someone had to use the restroom or respond to phone calls? Or had weird lag issues or his USB bus decided to suddenly ignore his game controller (tho enough times and I just trashed it

)? Or was just reorganizing their UI profiles and hotbar assignments for the umpteeenth time because how I set it for toon X did not work quite right for toon Z. . .
If hard pressed to get the RvR flag to work right for this (I have been unflagged w/o realizing it, when standing right next to a BO), also adding combat as a preventative for timer release would solidify it, tho IMO that would encourage ppl to log off entirely, which might make them just quit; thus, not a recommended rules option.
I disagree w/all those QQing that ppl playing more than one faction in non-abusive moderation is inherently wrong. "Know thy enemy" is a golden rule for victory IRL as well as in MMOs, and sometimes you just want to explore all the game has to offer. WAR/RoR has a distinct advantage of having character classes that do not always mirror other classes, and are relatively easy to lvl, resulting in a colorful change of scenery which inherently adds "replay value" to the game. A lockout timer would disallow the opportunistic aspect of xrealming, while still leaving open the overall value fo the game for those who want to explore it. Assuming, ofc, that IP lockout on faction swap were possible, otherwise ppl would just take a bit more effort and make second accts.
Again, tho scaling and restricting rewards to ppl in the lake are good ideas, in and of themselves, tho IDK if they would actually prevent xrealming. An unstoppable zerg is attractive, scaled VP or not. Personally, I have only ever xrealmed on the rvr side of things once, when the guys on my side refused grps and KSd constantly. Sort of an "Oh, REALLY?" countermeasure.