The correct decision is a melding of model 3 and model 5. Every "pure" DPS spec needs to become a hybrid, but not by getting a tank or healer spec, but by being given a true fourth role.
To really make model 2 work you have to really commit to it. Dungeon finder needs to create groups of a healer, a tank, a utility spec, and 2 dps. They need their own forum, and the way they bring utility shouldn't be exactly the same as doing dps, except they do less of it. A true utility spec should have different gameplay and be making different decisions then a damage dealer.
Take all of those interrupts, crowd controls, offensive dispels, and non-damaging debuffs and put them on one spec. Give the arcane mage time warp, polymorph, etc... Make it so those players that choose Survival, or Affliction, or Assassination are those DPS party member who are always looking to interrupt, or the first to volunteer when something needs dispelled or cc'd. Then support that fourth role in your dungeon design.
Fourth Role: Utility.
If this were implemented, my currently waning enthusiasm to play the game would once again be renewed in force.
Back in mid-BC, I respec'd my original hunter to Survival (from BM) just out of curiosity, and discovered the glory of enhanced crowd control -- DPS be damned (Surv was a distant third in damage of the 3 hunter specs back then). To this day, even after the changes and revisions, it's still the only hunter spec I can play comfortably. Sadly, Surv has no true interrupt, and MM stole our Readiness... but old habits die hard.
I'll always be the first to CC that caster mob lobbing spells at the tank unrestrained, or peel the add off the healer and either drag it back to the tank or kite it until the tank can grab it again. Stuff like that is far
more engaging than just turreting. I don't care a great deal about raw damage output and topping meters (even though I do ok on them); I do
care about controlling the fight and making the tank's and healer's jobs easier, and generally ensuring the survival of the party.
DPS rotations bore me to tears, but when chaos erupts and I suddenly have an opportunity to jump into action and control the fight, saving us from a wipe... that's when I'm in my glory. I thrive on that kind of chaos, and I know I'm not the only one.
If "pure" DPS classes were to each have one of their specs dedicated to a new and vital Utility role, I would be absolutely in love with this game all over again.One last Edit:
OK, it's been a week now. You asked for our feedback, we gave it by the ton. It would be really great if one of the CMs would just chime in here with a short "yes, we're still reading this thread, please continue" so that we know we're not just burping into the wind here, because right now this is looking less like a crowd-sourced brainstorming session and more like "a place to send those wacky players who think they have ideas so they're out of our hair". Just an acknowledgement
... a nod, a grunt, a /wave, a /poke, something. Anything. Hello? Bueller?