Im not a tecky but wouldnt it have been better if blizzard would have just allowed shadow word pain to scale with haste like all other dots.
Then for them to fix the mindflay/pain and suffering bug so that mind flay refreshes current haste/crit stats for swp..
because the whole reason they nerfed swp is because we had the potentual to stack a ton of haste.. and use things like bloodlust and berserking with haste pots and on use trinket procs.. and glove tinkers to get a super machinegun hasted swp for the entire duration of a fight.
if you just fixed the mind flay/pain and suffering bug it would allow for use to utilize temporary haste buffs for the duration of the buffs.. and also would not be expliotable for an entire fight.
a good result of that fix would be that we could have on demand temporary damage bursts when we wanted them provided we planned for it.
seems to be an overall better choice instead of simply nerfing a skill into uselessness.