I don't think that's going to be too much of a problem. Here's the first two leather drops we can see from Naxx:

http://static.mmo-champion.com/mmoc/...tackgloves.jpg
http://static.mmo-champion.com/mmoc/...sofdiscord.jpg

And also this blue post from a while back:

Edit: I was too slow

Just a short example:
Shifting to Bearform directly after FB (so with 0 energy). After 10s your "hidden energybar" is at 100.
Without the Furor talent all your energy is lost by the time you shift into Cat.
With the Furor talent you keep up to 100 energy of your "hidden energybar" when you shift into Cat.
There is no gain of energy like it is in live at the moment, just no loss of energy after e.g. a Rebirth or something.

This forgets travel time, where you would be regenerating energy.

For pvp it's great: Cyclone, root, lifebloom, cyclone again, cat (+100 energy minus any travel time). Cat, focused so bear (+10 rage), left alone after beating on a bear a while so cat (+100 energy minus any travel time).

For soloing it's nice (heal yourself running to next mob, cat form with 100 energy).

For bear form pve:
For trash pulls, the 10 energy is nice but could probably be worked around using KotJ and/or creative pulls (wrath, root, bear?)
For boss fights, you'll likely use it once. Even if you use it several times, it will likely be an insignifcant amount of rage compared to MT rage generation.
For Gruul style sponge fights it might be more useful, since you'll be rage starved.

For the cat form portion pve, it's probably not as valuable as most other dps talents:

a) On a pure dps cat fight where you don't offtank, battle rez or innervate, you would gain 0 energy.

b) A furor friendly fight would probalby look like: 1) offtank then travel 2 seconds to boss: 80 energy gained. 2) innervate someone (remembering to wait for empty energy bar) with no travel time... 30 energy gained. 3) emergency battle rez, wasting a half full energy bar, running 2 seconds to the person and 2 seconds back: 80 energy gained.

190 energy gained for, say, a 5 minute fight. About .5 energy per second. We currently gain about 12 energy per second when you factor in omen procs. So it's about a 5% increase to our energy moves, or about a 3% increase in damage?

I think it's safe to say that on pve boss style fights, furor will increase your damage somewhere as little as 0 and rarely as much as 4% for 5 talent points?

That said, I don't see that we have much choice unless they change the resto tree around. And it is tier 1. The old talent with powershifting was definitely an underranked talent for its value.

That is quite intentional, and will continue further once all the talents are rolled out. We've only seen the bear-specific talents so far (Mother Bear and Natural Reaction.) There will almost certainly be some cat-specific talents added to boost DPS there, as well.

The developers have made it pretty clear that they want cat DPS to be relatively higher than it has been (they called it "terrible on live"), and to have bear tanks be as capable as any of the other 3 tank classes in LK. But to make them both capable of performing at that level, any individual feral character will have to choose between focusing on cat DPS or bear tanking talents. This is certainly a different sort of setup than what we've been used to from TBC. But if that means that both bear and cat forms can perform around the same levels as other classes in their respective roles, it's a good thing in my book.