Another cd wouldn't really add anything to shadow other than be a slight dps increase and have no effect on our rather low sustained damage. They just need to give Mind Flay a small buff to bring our single target up a bit without influencing the multi-dot fights we do well on. On a more "wishful thinking" note, I would like if they just completely reworked SW:I into an aoe talent; no one uses it anyway, might as well make it useful and therefore a choice worth making for aoe. Something like it just doing aoe damage instead of single target, or applying swp to all nearby targets when activated. Even with an 18 second aoe ramp-up, I'd be happier than with our current aoe.
I'm pretty sure they buffed it, because personally for me its amazing now. I went from close to bottom on aoe to the top. It almost feels a little too buffed. But I'm sure thats because it works with our mastery.
Mind Sear, in context of the time it's been added, til now, seems to be a really exact example of an ability that's all over the place. It feels like they just can't decide where to leave it, and, the result, is it's always getting ping ponged around and changed. There are other abilities like that in the game, but just looking at the total history of mind sear is a bit sad.