Bump for this post in regard to affliction tier set. Thank you rpg 
I will also add that this is yet another affliction tier set that has extreme bugs or is misleading that can be added to an ever-growing pile of poorly thought-out tier sets in the past couple of years for affliction. I’m curious whether the issue is an issue with the spec fundementally, or another issue entirely.
TLDR:
- The Jackpot mechanic is forcing poor gameplay interaction that intentionally disrupts our standard rotation and does not enhance it, especially when thinking about cool-down timings. You can game having an extra dot on your target in single target by intentionally not playing correctly and dropping your unstable affliction. This is a dps gain.
- The extra unstable affliction dots are not hard-coded to be affected by certain talents, which is misleading.
- Players are also being misled by the wording of “up to three targets” as the impression it gives is that it would also spread to the current target. There is no clause that states that these spread UA’s will not affect your current target.
Solution from a theorycrafting standpoint:
Like rpg was saying, the implication is that you will choose to drop your unstable affliction before your cooldown timings in order to benefit from having an extra unstable affliction through a jackpot proc on your current target, increasing rapture damage linearly. Since our UA is already a smaller portion of our damage and doesn’t suffer ramp up cost, this is a net gain in general for the duration of jackpot.
A solution would be to always allow an extra UA proc to apply to our current target, and then apply it to 3 other targets. This would be a net buff, but would solve the issue of intentionally dropping our UA. If I were to be bias, I would rather have every jackpot UA apply to our current target (as in 3 extra if there were no other targets) but would settle for a proper flowing rotation at the moment.