I don't see why you would put 71 into feral unless you absolutely never cat dps'd. I don't know any raiding ferals who spend 100% of their time in bear form. You're giving up a lot of dps skipping omen and naturalist for some pretty questionable tanking talents.
a) You can get a pure dps build that skips all of the bear talents and is probably 100% dps, 70% survivable?
b) You can get a pure tank build that picks up all the marginal tanking talents like impact and FA and ends up maybe 100% survivable and 70% dps?
c) You can get a hybrid build that skips only the bad tanking and bad dps talents and ends up about 90% dps and 90% survivable? That seems like the ideal situation to me, something like:
Talent Calculator - World of Warcraft
with plenty of reasonable debate about PI, ILotP, Feral Instincts and 5/5 furor vs 2/2 IMotW depending on how you play.
(Do we know for sure PI's crit doesn't apply to bear anymore?)
What are you giving up with that build?
Tank:
FA: attack debuff when someone without a similar talent isn't around.
Impact: More frequent stuns / interrupts (interrupts are generally more than covered on 10 and 25 mans, but stuns can decrease damage against non-bosses)
Tenacity: Less duration on stuns (rare in pve) and fears (you should have FW if it's important)
Imp Mangle - replaces 1 (lacerate or swipe) with 1 mangle every 18 seconds
Cat
FA: 15% more damage on a finisher that you might use every 2-3 rotations
Imp Mangle: In a group saves 6 energy per 12 or 18 seconds or sometimes never (bear or trauma bot). (Ignoring how useful it is for soloing/pvp though)
MSS: 4% more crit.
I'd invite a build like that to a raid for either a MT or dps role (assuming a 100% cat specced druid's dps stays competitive to other dps'rs).
@Valerian
That dps cycle looks about right at 70 to me. The only thing I can think of is adding a wait before you rip for nearly full energy, especially if you're mangling.
I'm thinking something like mangle, rake, shred to 5, wait for 70ish energy, rip, mangle, repeat using rake whenever it's not ticking. It also helps make sure you have bleeds for RnT for shreds (in case rake falls off in there). If rip's still ticking and you're near 100 energy, maybe an extra shred while you wait for rip to wear out?
Do we know that they're buffing rank 5 of rake? Or is it just the new ranks that get buffed?