I doubt its worth it.
Arena really just comes down to being elite at 1v1, playing with elite partners, using focus macros, knowing every ability in the game and making videos to become e-famous
Read Reckfuls guide to rogues on arenajunkies, its really nothing special at all. You can be #1 in the world and still offer no real valuable insight that a million other people havent already told you.
Yeah, not really. You can be the best in the world at 1v1 but still fail at arena if you don't peel for your partners.
Skill-capped is a nice idea, but there's not enough content yet to justify it, though it might be worth it just for the forums (basically an AJ where you can ask any question you want without getting trolled/flamed into a derail).
For the record, I don't know too many rogues that know how to play the way Reckful does in this video
. 99% of rogues just faceroll; they can target-swap and CC, but I doubt they ever consider playing defensively with some of their cooldowns.
Just my point of view after giving out years of extremely basic advice. Everyone always asks how to get better at PvP and where to find more advanced strategy, and $24/6 months isn't that expensive as long as the content is there (both forums and videos), IMO.