Infraction: Useless Post
Message to User:
After reading through a couple times your post isn't necessarily bad, just it tries to do a lot without supporting evidence. Anecdotes are cool and all but when offering large, overreaching advice be sure to include some actual data with it.
Here is some advice I've been preparing for my guild; my perspective is BM but parts are relevant to other specs.
Level 70 3.0 specs were discussed a few pages back, but here is the basic rundown. Longevity isn't worth it right now without the glyph; it just isn't that much increased DPS. It is very intuitively appealing, and seems like it would be great, but just doesn't hold up compared to points in Kindred Spirits. Cobra Strikes is much better (partly because you can skip a point in frenzy). Animal Handler is basically useless now since you should already be at hit cap and your pet inherits your hit, so those points can be spent elsewhere, with Spirit Bond being a popular choice because of the +heal (quite nice in a raid environment like Sunwell).
I don't think a 50/11 build can work because of focus stalls, but it may be worth trying, depending on your crit rate in a raid buffed environment. I suspect there will be focus stalls, but perhaps not 4% pet dps worth of stalls (unless it prevented a stacking debuff like scorpid poison from staying at 5 stacks). With Mortal Shots no longer affecting autoshot, three points of MS are better spent in careful aim. Both Haste and Crit are now worth less to hunters because of the unlinking of steady shot and the change to Mortal Shots, respectively. So somehting like this 49/12/0 build (the point in Longevity can be moved anywhere, such as Invigoration, but I think it will do more damage here, especially with a cat since it can mean 100% uptime of rake).
Currently I'm personally seeing the highest DPS from a scorpid (roughly 1000 dps in a random raid buffed setting on random debuff training dummies; poison damage was higher than melee attack damage, and would tick for crazy amounts). Cats are close at around 850. It depends on various factors (I'd like to get trauma or mangle debuffs up to compare). My personal DPS is around 2.9k-3.1k in this situation (with gear you'd expect when 4/6 SWP).
Aspect of the Beast looks like it possibly could be the highest DPS aspect, at least during Bestial Wrath. Ten percent AP to your pet is significant once you're in a raid buffed situation. I did some testing and dps was close enough to AotH to be a draw since raid buffs etc weren't really held static. More analysis is needed, but the cost of switching aspects too frequently may wash it out; maybe in a hawk->viper->beast->BW/tinket->hawk rotation (so only costing 1 GCD for beast, which for aspect switching, is just one second).
Serpent Sting should be worth keeping up at all times, especially glyphed (Curse of the Elements will affect it). Scorpid Sting is less so with a 3% instead of 5% reduction in +hit.
Hunter's Mark no longer stacks with each ranged hit, so bear that in mind; this especially makes the Imp Hunter's Mark talent worthless at 70 (and probably beyond). Bummer.
Heroic Presence from Draenei will give you +1% hit much more often nowadays (since it is both spell and physical hit, and no longer dependent upon the class the draenei happens to be). In most raid environments, hunters are in a group with other hunters, a resto shaman, and a feral, so for Alliance, that group will now benefit from the +1% hit. Most buffs are raid wide, but this presence isn't; likewise, Leader of the Pack isn't, so try to get the group you had pre-3.0.
Also, as-is, the best glyphs will probably be Glyph of Serpent Sting and Glyph of Rapid Fire (remember you only get two major glyphs at level 70). Sadly the truly powerful glyphs require Northrend mats.