My two cents:
Stun : Is certainly different, and powerful both for monsters and players. However the only issue I see is stun avoidance (and hybrid) as is it now, is a waste of an affix, should be something much more poweful you may want to invest occasionally.
LP Rarity/Weighting: I’m OK with it.
No Companion Skills While Transformed: Can’t say much as I didn’t play much with druid, but something for sure to look at.
Arena Echoes/Disparity In Echo Times: Not an issue, I expect more thing to do while pushing though a mono in the future, and better loading times (and optimization in general BTW).
Dummy/DPS Meters: Agree: a great way to try our builds and showcasing, a dummy with empowered monolith type resistances/defenses for a better understanding of our power well be very nice.
Stacking Keys: QoL i don’t care that much.
Skills Without Attack Speed Scaling: I think this is a big issue, some skills are left far behind due to the lack of proper scaling, I experienced it with Dancing Strikes, trying to make it worth at endgame, and refered to it in this post:
https://forum.lastepoch.com/t/feedback-balance-request-based-on-my-blade-dancer-experience/47417/2
Poison Vs Other Ailments: Not a big issue, maybe some cap or diminishing returns at shred or negative resistances and that’s it, bleed is still very powerful.
No Movement Skill (Spriggan): Agree, specially if you want to be spriggan permanently.
Crafting Mats to Inventory: Not a big deal, in fact, current state suits me quite well, I do it once, before starting a new mono, or when I am in town, and is a good way, as I get message of full inventory, next town visit/before next mono I empty my inventory.
Minion HP Decay Mechanic: I don’t see an issue, is a design choice.
Set Items: I feel they are falling in the same place of D2, and is a bad place to be: Extremely niche 10% and you must build around them, 90% for levelling/useless. I would defenitivy want to see more love into them, without making them BiS, of course. Is very hard to fit them in current gear progression, I can see however, less of an opportunity cost with good suporting affixes so you don’t lose so much against a T20 with desired affixes, after all you lose a LOT of flexibility using a set, also the set effect should be something unique and could be a build deffining effect. I feel they try to get those right but they end falling too short.
Block/Bastion: Bastion of honor is just too powerful, also because how the game is designed, you have a much easier time getting the offense for 300 corruption than getting the defenses, so is just a perfect fit in too many builds, even without LP.
No Auto-casting: Yeah, this should be a thing for certain skills, being able to just left-click or press it for a few secs to auto-cast it when not in town would be a nice addition.
Snapshotting: I don’t see a issue here. If we are able to do so with certain skills is nice, if not, well, is up to developers.