"If I have to pay a hybrid tax, I should be able to be a true hybrid. If I can't be an actual hybrid, then there shouldn't be a hybrid tax. That said, hurray for herobear!"

I agree with the last sentiment (lots of fond memories of when I was feral), but the first part seems a bit off. I'm pretty sure developers have never intended anyone to be able to fill multiple roles (heal/tank/melee dps/caster) competitively in a single encounter. Instead, "hybrid tax" refers to the basic idea of being able to make choices with your class. The hybrid tax was intended to be a penalty to combat ability to make up for non-combat versatility. They have gone back and forth on whether they want that to exist at all, and if so exactly how, but they've been clear all along that they don't want hybrids tanking like a tank while dpsing like a dps or healing like a healer with no penalty at all except for switching forms/stance/presence/whatever.

The hybrid tax is a tax on those who can do two or more of the roles in the trinity at all (healer, dps, tank) and is to differentiate between those who can and those who can't (hunter, rogue, mage, warlock).

It is not a tax on being able to do tanking and DPS with the same spec.

And it's largely not around any more anyway. In a perfect world the 4 DPS only classes are going to be tops on the meters, but in practice this doesn't happen most of the time.

The reason ferals are down on DPS has nothing to do with a hybrid tax. Other class/specs that can dps and do something else are fine or even insane, and note that moonkin are utterly wrecking.