Didn't have much time today, so here goes. Gonna try to keep it brief, since I tend to type too much.
I'd say talent build depends on server type a bit. PvE realm, it's fine not to have Feral Charge in a way. Useful to have, but not critical. On a PvP realm, however, I found it quite useful against some people who tried to kill me.
Feral Instinct is actually good for the grinding/leveling part too. It allows to get pasts nasty spots a bit more easily. Still not critical, but a good choice, in my opinion.
Thick Hide, on the same tier, is not that useful for leveling. The armor boost won't be noticeable that much and, frankly, you regen enough mana while in Cat form to heal yourself when you need to. It's more of a tanking talent, in my opinion. (That is, until you hit the mitigation cap at late end-game) So yeah, I'd drop this and take Feral Instinct 3/3 and Brutal Impact 2/2 like you already have to keep moving further in Feral. But it's not worth respeccing for I think, at least not unless it prevents you from getting Mangle ASAP.
Survival of the Fittest and Predatory Instincts have very little effect on your leveling process so pick whichever you prefer. The 3% stats won't show right now, but being crit'd less often is nice. Dodging AoE and crit'ing for a bit more damage is nice too. It's a toss up, really.
You'll probably respec later anyway and right now your build is solid enough to keep you going for a while so I wouldn't bother with it unless you really have the spare money to spend.
For gear, Str/Agi is good. I love Stamina personally so I always end up with much. Good for surviving those bad pulls. Pure Str/Agi is ideal when you have someone else who takes hits for you, but for solo it's fine.
I'm not gonna break down into the best piece for each gear slot, but you seem to be on the right way.