There are a bunch of problems with your opening post with a poll. First of all if you are going to make a poll the initial post should be objective and not completely biased as you are already trying to sway the audience. Next your statement about a 10 year old game being better than current content is solely opinion and based off of facts(if anything looking at facts the game has more subs than it did in Vanilla so but that is a very poor measure), but I am not hear to argue what is better or not. What I am going to do is laugh at your idea of getting Vanilla servers for the combine current monthly subscription. That does not make blizzard anymore money but costs a bunch more. If, and this is a GIANT IF, Blizzard were to make Vanilla servers it would have to be treated as a separate game, they will charge for the original purchase of the game again(they are going to have to develop a game again to use new hardware, integrate it into battle.net systems and determine which features from current carry over) and charge a separate monthly fee for the game(keeping servers for a separate game costs money and then the decision of whether to keep servers in all regions or centralized location).
And now you complain about a 12 month content drought when a Vanilla server will have a FOREVER CONTENT DROUGHT. They would not develop further content as it would contradict the current storylines. But hey while your post is long it has holes all over it and is definitely not thought out.
In before you were not an original player, wrong Raided with Deus Vox on Laughing Skull through AQ40 and Naxx on my warlock Sundronez. And will whole heartily say that the Vanilla WoW was not a better game, it was full of horrible exploits(a hunter/rogue could farm chests in Mara for blademasters gloves for hours and make 10k a week no problem, item dup tricks), glitchy ground and mobs(mobs in instances would permalink and you would have to reset), decurse spamming, mods that would play the game for you worse than current, horrible quest design(kill 100 of this without any story behind it, the quests were not linked in a story), raids that had mechanics that would kill you even if you did things right(the old parry mechanic) and this is only the tip of the iceberg.
The only thing I am missing from Vanilla is the community but a Vanilla server will not bring that back as most of the old players have moved on with their lives and we now live in the instant gratification world of social media.