I gather there was a little tempest over one of the Vanilla WoW pirate servers. So much so that people are calling for Blizzard to officially support Vanilla servers. Personally, I think the demand for Vanilla servers is overrated. I think that if Blizzard opened one, a lot of people would join, and then the vast majority would quit within three months.
Not to mention that it would be a pretty expensive undertaking. Unlike pirate hobby servers, Blizzard has to pay the people working on their Vanilla servers. People are expensive.
Maybe I'm a little cynical about gamers, but if there is this pent-up demand for a Vanilla-like experience, why don't people go and play one of the current MMOs that offer a similar experience? Games like RIFT or EQ2 or FFXIV? I'm sure the potential audience will always have a reason why the option you have to pay for is not good enough.
The Vanilla Paladin
Azuriel has declared that a lot of the Vanilla and TBC design was garbage. That may be so, but he has singled out the paladin class as an example. Thus I am forced to defend it.
The vanilla Paladin was not badly designed. Rather, it was designed for a game that soon became obsolete. The paladin was designed for 5-man groups, where the make up was [tank, healer, 2x dps, paladin]. The paladin would back up the tank and healer at the same time.
That's why the vanilla Paladin appears to be so passive. Its combat is very passive. But that's so you could run up to a mob, Judge, Seal and then focus on your group. You'd throw out heals, cleanses, and Blessings as appropriate. The UI was designed for this, so that you could throw spells on groupmates without losing your main target, even without mouseovers. You could tank one mob, or small adds, when the warrior took the rest of the group.
Shamans were the opposite. Shaman support was passive, through totems mainly, but their damage was active. Paladins had active support, but passive damage.
The thing is that this system does not scale into raids. [3x tanks, 3x healers] is stronger than [2x tanks, 2x healers, 2x paladins]. And obviously solo play is fairly boring. Though honestly, I kind of liked it. It was very steady and relentless.
But the Vanilla paladin in 5-man groups is still my favorite MMO playstyle, across all the MMOs I've tried.