I am not a good player personally but I really don't like the changes made to Treewarden. It was never a really good class to begin with, and now it feels even worse.
First of all, both Thorn Strike and Wildfire drain a lot of mana. Wildfire was always a bit mana costy, but its previous mana cost was nothing compared to what it is now, and pummel didn't cost mana at all, you never had problems with its mana cost not even at level 6. I don't really feel the damage buff for it either, I guess the mana costs overshadows it. The animation change for wildfire is good though.
Next, Thorn Strike. It's a whole different story. First of all it doesn't proc from melee attack. Secondly, it doesn't stun mobs as pummel did, and thirdly, it does much worse damage than pummel because it uses the slow attack animation which is really really cancer. It would be amazing if it used the fast attack animation, and then I wouldn't mind mana cost/no on attack procs etc. But really this skill is worse than pummel in every way possible, also it's area of effect is smaller than pummel as well.
The only "advantage" is that you can cast it from range. But that's really fucked up, you're a huge tree, literally the strongest-looking morph in the whole game and you're forced to stand behind and pew pew from range like some pussy, which is hilariously absurd. TW was always the class that immediately rushes to mobs, and the faster you reach them = the better (because of pummel stun).
The other thing I find completely absurd is that you can kill fire immune mobs faster with WILDFIRE than with Thorn Strike, because of the fast attack animation, without even using Mythal or having any pierce etc, it's very absurd imo.
Anyway to conclude I think Treewarden became even worse, while it was never really that good to begin with. I am not complaining or mad by the way, I really like the new patch but I just feel this change was completely wrong. IMO bring Pummel back or give Thorn Strike the fast attack animation and it'll be alright.