this might help mat:
My preferred first 27 levels of druidic talenting theres a lot thats open there, but thats on purpose. this just highlights what i think are the best initial talents to get, and theres a specific way to get them.
the first thing you want to aim for is 2/2 feral swiftness. this serves two purposes: first, its more survivability in cat and bear forms thanks to the extra dodge. secondly and most importantly, its a 30% move speed bonus at level 21. that cuts down on travel time IMMENSELY.
after that, at level 22, i nab feral charge, because its a VERY useful skill to have, and the only interrupt a druid has available (vital to beating casters that heal in the low levels). however, feral charge is kinda gimp when you first enter bear, since you have no rage. thats why the next 5 levels are dedicated to getting 5/5 furor. so when youre fighting that healer and he winds up a nice fat heal, you can flash into bear, back off a few yards, interrupt it with feral charge, smack him with bash once the lockdown period ends (4 seconds) and then swap back to cat while its stunned to finish it.
its also awesome in pvp, because it gives you the security of an instant bash or feral charge anytime you need it, which is key to surviving and winning.
after getting 5/5 furor, you fill out the rest of feral. at 50, you spend the G and respec to full feral (to get mangle) and then fill out 5/5 furor and begin your climb to omen of clarity in resto, grabbing 5/5 naturalist on the way).
now, if youre not into pvp, and you want to avoid the respec cost, you can just go straight down to mangle. but ive never leveled on a non-pvp server, and i like to be battle ready at all times if possible, so that governs my speccing decisions.
youre right about the general idea behind speccing; you WANT to go deep into one talent tree. being a balance/feral/resto hybrid means you pretty much suck at everything. or, to put it a nicer way, you find your "ceiling" in each role to be much lower. with a few rare exceptions, the best builds will generally have at least 31 points in a single talent tree, and typically 11-20 points in a secondary tree with the remainder in the primary tree or divided between the primary and tertiary trees.
for some speccing reference, here are a few common builds for the druid class:
cookie cutter resto druid arena spec deep balance dps feral tanking build note how all of them have at least 41 points in a single tree, with support talents picked up in the other trees (which in 2/3 of the cases, the spec is limited to just those two trees, not a third one).
i dont think there has been an effect "tri-spec" build since before the xpac came out (21/8/21+1 rogues). anything that dips into all three talent trees will have a very minor focus (under 10 points) in the tertiary tree.