Well look at it this way, subscription costs have stayed the same in basically a decade. Had they truly wanted to be greedy they would have kept up with inflation and raised the price by a couple dollars.
Even for example 2 dollars a month would probably cause a fucking shit storm, but with some of these micro transactions it's curbed the need for them to even do it.
Pay to win is giving an advantage beyond the subscription cost for doing the things that are perceived as competitive, PvP and PvE content. To some extent you can mold that to include the leveling experience, but there is nothing that remotely indicates that leveling is competitive or that it requires any bit of skill to perform.
The way I look at it instant 90s are done for multiple goals and not just one. Yes them making more revenue is clearly one of those goals, but there is a clearly a demand from consumers or else they wouldn't want to implement it. Blizzard wants your money, why would they give the option to skip content that can take some very casual players months and months to accomplish? Simply put it's because of the convenience factor. Whether you believe it or not the shear amount of time you have to put into the game to catch up after not playing for an expansion or two is actually fairly discouraging for returning players, not to mention players who want to play with their friends. I have friends that want to play but simply don't want to put in several weeks work of getting back to level cap.
I'm not going to buy boosts to 90, but I can see how it's beneficial on so many levels aside from just lining Blizzards pockets.
What do you expect Blizzard to say?
Do you think they would admit planning on making WoW P2W?
They are going to keep introducing microtransactions, more and more, and keep explaining why what they introduced really isn't p2w (even if it is) much like many of their fanboys have done.
"Yeah you can buy gear, but it's not the BEST gear in the game, so it really isn't p2w"
WoW having more subs than SWTOR is the same thing as Justin Bieber having more youtube plays than Tupac. Just because its more popular doesn't mean its good.
Warcraft Lore has gone from one of the most vast and interesting stories in all of gaming to a bad Thrall Fanfic by Chris Metzen.
The term p2w is razor thin when it comes to what services qualify. But ppl have different tolerance to p2w. Some say saving 100 hours is winning, some say selling bis gear unobtainable in game is.
What's the worst that can happen to you ...