From what I've seen Fury's will probably end up being the least wanted for their healing abilities. We get the major ones, but lack in support heals. If anything we will be sought after for back up.
This is fine with me, healing is boring.
They are going to want us probably more so to fill a DD role in a round'a'bout way. Meaning we will increase the damage output/accuracy of the whole party which will probably equal about the same as another DD toon in the party.
To be honest the Warden looks like a wanna-be cleric that can turn into a wolf. He won't be able to buff or heal as well as a cleric, kinda of the jack-of-all-trades of the healers. They have nothing to offer a group that another class can't offer better.
This is my opinion, and there is still a long ways to go before anyone hits end game...which will be when everything starts to fall together. I could be completely wrong, but after doing alot of research, I feel Fury's will eventually be sought out more than a Warden just because of the damage output we will be bringing to the table, where the warden's have some nice regens....and uh....yea...