T8 set bonuses

Enhancement 2Piece Bonus -- Increases the damage done by Lava Lash and Stormstrike by 20%.
Enhancement 4Piece Bonus -- Increases the frequency of Maelstrom Weapon being triggered by your melee weapon attacks by 20%.

They seem pretty good at first glance. The 4 pc depending on how they apply the 20% could be incredibly OP. I'm guessing they will apply it multiplicitively however



ETA
Found this post by Levva on EJ
very nice breakdown

T7.25 vs T8.25

Armor 5224 vs 5337 = +113
Agi 303 vs 305 = +2
Sta 351 vs 324 = -27
Int 247 vs 268 = +21
Sockets 4R, 1Y, 2B, M vs 3R, 3Y, B, M = -R, +2Y, -B
Crit 182 vs 190 = +8
Haste 31 vs 187 = +156
AP 778 vs 920 = +142
Exp 82 vs 74 = -8
Hit 130 vs 126 = -4

Socket Bonuses +6 Crit, +8 AP, +27 Sta vs +10 Agi, +12 AP, +4 Crit, +6 hit = -2 Crit, -27 Sta, +4 AP, +6 hit, +10 Agi

and of course set bonuses

* 2 pieces: Your Lightning Shield damage is increased by 10%.
* 4 pieces: Your Flurry effect provides an additional 5% melee haste.

vs

* 2 pieces: Increases the damage done by Lava Lash & Stormstrike by 20%
* 4 pieces: Increases the frequency of Maelstrom Weapon being triggered by your melee weapon attacks by 20%

The thing that stands out is a LOT more haste especially when melee haste is getting a +30% stats boost anyway.

Looks like stat breakdown is pretty much a wash aside from adding a lot of haste and AP, and better socket bonuses.