My 2 cents. For what it's worth. I posted this elsewhere not realizing there was a designated feedback post.
Willbender
This one had me the most excited initially after watching the promo. I've played a lot of guardian both FB and DH. I made this one first and just as excited as I was to try was equally met with disappointment. The talents feel punishing due to the disadvantages they tied in to try to offset the advantages. It almost feels like a choice between a lesser disadvantage rather than an exciting bonus or advantage. The damage left something to be desired as well. I was overall very disappointed and if this isn't reworked or buffed I will likely never bother playing this when it goes live. This is very sad because I greatly enjoy playing guardian was looking for a fun new twist for the profession.
Virtuoso
If I'm not on my guardian I'm probably on my mesmer. Again, I was excited when I saw the promotion. I think this is probably tuned right where it needs to be but it felt squishy to me. I'm curious what other beta testers think? The damage feels great so I honestly think this specialization probably needs very little work before going live. I think it's still slightly confusing how the talents play into the daggers. Do talents that buff clone damage now buff dagger damage? So all the clone damage is loaded into a mechanic gated burst? It's interesting and I suppose balanced at face value, but I'm also curious to see how this plays in pvp. Overall, I like the concept as long as you can still get use out of phantasm and clone talents. I would like to see something that helps soloing after losing clones which are such a critical and foundational mechanic for mesmer solo play.
Harbringer
I honestly play necro the least out of all professions so I tried this one simply out of curiosity. I have greatly enjoyed condi specs in the past and I have to say I was thrilled when I started playing with this. I enjoyed the concept of the utility skills, but they almost seem a little boring to be honest. However, the damage and survivability is incredible and the gameplay feels fantastic with nothing more than basic carrion armor/stats. I wouldn't be surprised if this is nerfed before it goes live. As it stands, I might be playing more necro!