Thats the funniest thing ever read on forum since a while, you're really telling us that Blackrock gearing system is hardest. Just lol.
If u're any close to decent it takes 1 day to get full BiS offsets, at that point u'll be in any possible case higher then any player on the other 2 realms could be in a week or so. Then you can just do your games to get flushes.
Also, you can just que Soloq when you dont have anyone to play with.
Gosh these people nowdays...
On topic: You're correct tbh, Lordaeron has been hitted quite hard from this crossrealm, altho i guess that "no bgs or arena" are still worst then face Icecrown/Blackrock players, yes the gear difference especially for the "starters" is kinda a problem, but as Lordaeron is an "hardcore PvE" realm, you can avoid the situation quite easy:
Farm bgs
Farm EoT
Do your weekly arena games
Takes times i know,