Wowinsider reported about some changes with the dual spec feature that is coming with patch 3.1. Apparently players can use it starting at level 40 and there will be no need to have a reagent. In the previous incarnation it was said that you would have to have an item crafted by an inscriber but that seems to have been dropped. Now you only have to cast something which will take about five seconds and after that your talents, glyphs and action bars will have changed. And so you will be able to change your specc in the middle of an instance or raid.
Since I do play a restoration druid as well as a protection paladin, I am excited about this new feature. There are times when I would not fit into a group for a heroic instance because we would have had two healers and soon I will be able to go along as a damage dealer. Sure, I will have to collect some gear and actually have to learn how to do damage as a druid but I will at least have the option. I however doubt that this feature will be the solution to the tank and healer shortage. There are plenty of viable healers and tanks available right now and being able to respec will not raise that number. The problem in my opinion is that some people just do not want to tank for various reasons.
1. Responsibility
As a tank you are the one person in the group who has the most responsibility. You set the pace and you decide which mob to take care of first. If there is crowd crontrol available, the tank usualy decides which mob will be controlled. And if something goes wrong and another group member manages to grab aggro the tank has to react quickly and get the situation back under control. Aside from that, the tank has to know his own class and know how to minimize the incoming damage while generating enough aggro so that the damage dealers can do their job as well. So, generally it is easier to play a damage dealer since you only have to know your class and most of the time are told what target to hit.
2. Equipment
Getting to a point where one can really tank heroics and raid instances takes some time. It is not that easy to hit that magic at which when you become uncrittable. It takes some planning to learn in which instance the next piece of gear dropps or which faction will yield the next gear improvement. Sure, that is basically the same for other classes as well but when I look at most of the people I have grouped with it does not seem like many players really do that.
3. Conflict
When you are the one who is supposed to be the one who is setting the pace and there is a problem within the group most players will look at the tank to be the one solving it. This is something that some player shirk away from.
Undoubtedly, the new feature is a very good one and maybe I am wrong in my accessement. It might very well be that the option to have a tanking spec will lead to people getting interesting in giving tanking a try. If that happens there might be a few new tanks and that really would be a relief.