If we take Maalakai's 3/13/55 spec as baseline for deep destro (and I believe we do), I am curious to see where those 3 points in Suppression should go as hit rating increases.
We don't yet know how much hit is available on Ulduar gear, so it's difficult to assess whether that 3% is better served by gear or talents, but knowing what kind of DPS increase the options provide would be worthwhile.
As I see it, the two options would be
0/18/53 or
0/13/55.
I know that the 0/18/53 is going to be around 1% to 1.5% more damage (12% more damage on imp, which contributes about 10% to 15% of total), but how many GCDs is ImpSL saving? I realize this is highly dependent on the average length of fights in Ulduar.