Was about to say that...=) Its an important definition Kitru.....A pure democracy would be even worse than the stolen democratic republic we now have.

As for the OP, While I wouldn't mind some hybrid classes, that can fill 2 roles for a time, or something along those lines (ie have necessary cool downs to tank for X amount of time, or being able to switch to healer as a DPS in a certain stance, or just in general have some utility heals that take burden off the heals but long cooldowns whatever.)

The trinity is here to stay, I prefer it.

Never seen such a tank disparity before, the underlying reasons are as mentioned and of course options! Neither tank do I particularly like, healers also only have 2 options, but the difference is exactly what Kitru said, plus as a healer soloing is quite easy typically (im speaking in MMOs generally) and so you have people gravitate towards those roles with less responsibility more options and easier time soloing while waiting for a party.

I think if they add 2 more tank classes, the disparity would lessen.