I spec'd Nature Walk specifically for Treyloth but I haven't been too disappointed with it in general, really. I wish they'd define what "some" knockback is, though. I get the slight impression the "some knockback" is really "no knockback but we're going to put this wording in here so wardens will shoosh already".
I'm torn on this argument. I have to admit a certain amount of ennui on MT healing all the time (when it's a defiler/templar/warden trio, and the defiler and templar are good at what they do, MT healing becomes a snoozefest.) However, I am not keen on being anything else; I love the warden class for reasons already stated - healing, soloing, et al - but our functionality outside of the MT setting is... well... I know I've been put in the group with the fury so she can DPS while I heal. 
having said that... I've complained and whined and moaned about being in the MT group all of the time and how there's no challenge to it, but I've noticed that outside of a fury/inquisitor no one else gets put in the mage/scout group on our raids unless there isn't anyone else available. And really that's as it should be - our buffs are very defensively based, as templars, with furies and inq really boosting the dpsers. So I take my lumps with that and autofollow the defiler's dog while I eat my ice cream.
we need tweaking (then again, what class doesn't?), but we're not broken.
as an aside... the "shoosh" replaced a four lettered acronym for a pharse which loosely translates to being quiet on a certain point... i wasn't aware that SoE was going so anti-profanity hardcore, reminds me a little of the pea*%& days. 