Every Horde raid team is going to want to run 2+ pallies, and every Alliance raid team is going to want to run 3+ shammies. If they’re not a bad player/person, they will likely be welcomed with open arms whenever they reach 70. They’ll be rock stars. Everyone wants those new buffs. They will be in huge demand.
2 weeks in the grand scheme of things is nothing. There will still be tons of heroic runs going on, including a bunch of alts that people will be leveling up. And due to the heroic daily and badges, there will be people running them all the way through Sunwell, as I remember.
i play another longtime pay to play mmo, smaller niche audience but what they have done well over the years is not catering to the whiners! unlike blizzard!