Shots that cost focus should give a partial refund when they miss. If that isn't happening, we'll fix it.
We don't think Steady and Cobra Shot need to provide resources even when they miss. We're not going for a design where hunters can be certain to always have maximum resource income in PvP. As long as they have enough focus, they'll be fine. If we see evidence that hunters are focus-starved, we'll adjust accordingly, but we haven't seen that so far. There hasn't been a ton of PvP testing on beta yet. There has been a lot of speculation, and while that is still valuable feedback, it is understandably less valuable.
If Shred and Backstab were so reliable in PvP, I don't think there would be such a storied history of druids and rogues asking to buff alternatives to the positional requirements or just removing the positional requirements for PvP. In other words, I think "melee can nearly always attack from behind in PvP" is overstated.
If hunters get close to hit and expertise caps, they should do fine even against Agi users with high dodge chances. They won't do fine against a rogue that pops Evasion, but Evasion is intended as a survivability cooldown. Different classes are different and cooldowns and durations all vary, but I don't know that rogues have a great counter for Deterrence either.
The loss of minimum range is a huge hunter PvP buff. I don't think we've seen the full ramifications of it yet.