Hello, and thanks for opening up this channel.
I will speak from a BM perspective since I am more proficient with BM than Marks, and I don’t play Survival. I also will lightly touch on Mythic+ but will focus more on raiding since someone likely has a better perspective on the Mythic+ benefits and downsides than I will.
Tier 2-Set Bonus
At the time of making this post, the tier bonus is as follows: “Your Kill Command critical strike chance is increased by 15% for each stack of Frenzy your pet has.”
Issues I have noticed.
This set bonus further emphasises the strength of BM being single-target damage. While this is not necessarily a bad thing, BM throughout Shadowlands has lacked sustained AoE damage since the loss of our BFA essences and Primal Instincts, Dance of Death and Rapid Reload azerite traits which helped prop the spec’s AoE damage up in the later tiers of BFA. Our AoE damage is very low outside of Wild Spirits, and to a lesser extent, Resonating Arrow combined with the Rylakstalker legendary for Kyrian hunters.
Change the set bonus to perhaps a lower amount of flat critical strike chance and change the effect to "Your Kill Command and your pet’s Basic and Auto attacks have x% critical strike chance per stack of Frenzy your pet has."
This will potentially improve the AoE output of the spec through more significant Beast Cleave hits and build on the solid single-target damage the spec can output.
Increased Kill Command crit potentially opens up new build options for Beast Mastery through the Ferocious Appetite conduit, either the Flamewalker or Call of the Wild legendary effects (although not likely at this point in time) and the Killer Cobra talent on the level 50 row. This is healthy for the spec as tier sets should promote build variety.
Tier 4-set Bonus
At the time of making this post, the tier bonus is as follows: “Kill Command critical hits increase the damage and cooldown reduction of your next Cobra Shot by 40%.”
Issues I have noticed
I can see the idea the developers are trying to go for with regards to this tier bonus. However, it also seems to clash with already existing mechanics in the spec. You will still likely use two Cobra Shots between Kill Commands outside of Bestial Wrath windows, so the cooldown reduction is therefore made irrelevant. The tier set makes the Killer Cobra talent relatively strong, and Killer Cobra already has this mechanic built-in but better, so the cooldown reduction is wasted here.
I think the 4-set bonus would probably be okay if the cooldown reduction were removed and the damage buff slightly increased.
Hoping to get better insight after playing with the sets on PTR, but the set seems like it’s in a solid place. The set bonuses could maybe do with some minor tweaks to reinforce the developers’ idea while removing some of the less impactful effects and improving the spec as a whole.
Thanks for taking the time to read this post.