Ok, here goes my full on feedback on Druid:
Passive Tree overhaul:
The synergies and options are really well done. I can’t think of many build ideas I have where I wouldn’t want more points in Druid if I could. There also aren’t many skills I see as ‘trap’ choices.
Singular forms:
Werebear is insanely strong. The innate link to Swipe & Warcry trees on top of being able to cast 4 skills from the tree makes the Werebear a very strong ability. Unfortunately, it leaves little room for other interesting ideas. Outside of Lightning Rampage, there is no playstyle changers in the Werebear tree itself. It also doesn’t help that you can get 3 other skills linked to Maul for only 12 points, leaving you enough to fill out some of the 5 Rage generation nodes. It becomes hard to not fall into “Maul form with some support stuff” type of build. The base kit does feel very well rounded, I just wish I could do more without having to rely on Maul. (I’ll exclude the Bhuldar’s EQ shenanigans as it’s too specific)
Swarmblade feels very interesting as a minion & DoT form, but often seems to fall short in endgame performance. I like the Hives & bugs theme, but the Locust feel they die too fast if I want to do any melee damage myself. Some branches are also anti-synergistic, such as Locust Master & Viper’s Call. I am interested in making a DoT build, but so far haven’t found the synergy I’m looking for. Overall I think the form might need a few more tweaks to rival the burst that is Werebear.
Spriggan is probably my most played form, but mostly that’s because it’s available to Shaman. The kit is very nice with Spirit Thorns shotgunning, Vines as a poisonous minion wall and the utility of Thorn Shield & Healing Totem are nice. The only gripes I have are a) it has 0 mobility options and b) Vines generate so much Rage even for other forms, it feels in need of a rebalance.
Overall I feel each form has a good focus now, although Swarmblade is the form I’m currently least comfortable with as playstyle.
Multiform
Let’s start with Human Form: There is a surprisingly low amount of support for Human Druid. I would have liked that there were nodes that cast something on leaving form, or synergize human with druid forms. As it stands now, human form is so weak and uninteresting, there is little reason to not build rage regen in your build and stay in form. This feels like a needless cost of skill points if the alternative is in essence a non-choice.
Form Synergy itself is slightly weaker, as it requires a lot of setup. It requires a skill use, then a casted form transform, only to then be locked in the other form due to the 6cooldown. It feels very difficult to make a synergistic build if you know you have to stay in. The cooldown feels too long to be rotational use, so I feel most of my hybrid ideas end up being a different form for different tasks, never really trying to rotate skills from different forms. Ideally, I would have preferred if the form-shifting happened together with a skill. e.g. Turn “Human Form” into swap AND cast Summon Hive or similar while in Spriggan form, so I can switch around more rapidly.
Don’t get me wrong, overall the mastery feels very clear in what to expect, damage types per form are concise, but I just run into the points above sometimes and struggle to find a reason they exist. Still, if Shaman would get a rework up to this level I’ld happily play Primalist non-stop 
