Ok, I took arguably two of Sinestro's worst match ups in the lab Aquaman and Killer Frost and got some promising results..
Aquaman: After d3-trait is blocked you can punish all of his reversals with 111-shackles. You can also block his super move too. This not only takes away his wake up attacks but it has now made him hesitant to reversal punish your blocked trait allowing you to mix-up pressure.
Killer Frost: After d3-trait is blocked you can punish projectile daggers, low ice spike and flash freeze grab reversals with 111-shackles. You can punish her parry reversal with another d3 and you can stuff her slide reversal with d1-shackles, you can also block her super. Again this takes away her wake up attacks and makes her hesitant to reversal punish the blocked trait allowing you to mix-up pressure.
Of course only very skilled players will be able to consistently perform reversals after the blocked trait so you should be able to pressure with the mix-up most off the time. This can also block Superman's super move so you know its pretty safe.
Remember if the opponent doesn't block the trait after the d3 you get the 25% reset combo.
I think these match ups may have gotten just a little bit easier.
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