I've always been a huge fan of Blizzard's games overall but World of Warcraft is one that I've never played because the business model doesn't really match up with my gaming needs and expectations for me personally, however from a financial business perspective it was rather brilliant and over time it has been proven to be very successful for them. Having said that, every person playing a given game has to decide for themselves what they personally are getting out of it for entertainment value and what they like or dislike, what amount of money they are willing to spend on a game outright and/or in an ongoing basis, etc. and there is not really any right or wrong to any of it IMHO. Just about any business model a game company uses for a given game, whatever they offer is just what it is. Some people will like it and some people wont, and at the end of the day what ultimately matters is if the company can interest enough people in their product to produce a sustainable business model as long as possible from it. In that regard, WoW has been an amazing success even though someone like me isn't interested.
On the surface, as far as gameplay goes it is the exact type of game I'd enjoy and I have no doubt that if I were to play it I'd find it quite fun and addictive as it seems most people who have played it. But it's a rare occurrence when anyone puts out any game whatsoever these days that I am willing to spend $40-60 or more for and must have it badly, in fact it almost never happens to be honest. I go through phases where I play games for a few days/weeks/etc. and then don't play any at all for days/weeks/months, and so a game like WoW and the financial commitment a player of the game has to make don't really match up with the habits of someone like me. If they had a pay by the hour option available it would match my style better (not that I'd consider paying by the hour mind you, I wouldn't), but I wouldn't pay for something by the month and then not use it, so it never made sense to me to buy that game as I'd ultimately have played it for so many hours/days and then had it sitting idle for days/weeks and be funnelling money to Blizzard just to keep the account active or whatever. A buddy of mine figured out he has given Blizzard around $1900 since the game came out and I could never do that. I don't think all the games I've ever bought in my life add up to $1900!
But I don't need to either. The price to play the game just doesn't work for me upfront or ongoing but that's just me. It works for loads of others and that's why it's so successful and brilliant IMHO. So this new option is just yet another option people have I guess. Some people will find value in paying $60 to have the easy button to a high level character and find it is more worth it to them in value than it is to spend weeks/months of their time to work a character up to that point and so they'll fork out the money to get that benefit likely. In the end if people are willing to pay that kind of money for such a thing then it is worth it to them and they perceive the value in it to actually do it, and Blizzard's business strategy works once again. If it doesn't sell, it's not really a loss to Blizzard much and they could abandon the idea. So there's no real harm there I don't believe.
Sadly, despite loving Blizzard's previous games though I probably wont buy any more of them from them due to the current DRM, online requirements, cloud storage etc. nature of the evolution of their approach to gaming. I don't fault them for it, but it just doesn't work for me personally. At the same time, it's no surprise to me that people continue to enjoy their games and they continue to be successful overall.
I'd personally like to see a return to putting out games that appeal to a wider audience including single player strong stuff, DRM-free distributed beyond the borders of Battle.net but that seems just so incredibly unlikely to happen that despite fond memories of games past, I probably wont ever buy any newer titles they release in the future. Huge backlog of both DRM-free games and Steam et al games already.
However, if I were interested in WoW though and ok with spending the money on it monthly etc. - I'd want to play from the start and experience the whole game through all levels, so the easy-button level 90 thing wouldn't appeal to me personally. Not even for $1 TBH.