If only damage was the only factor in what made a class good rogues would be in a good spot right now keep the logic of thinking and ill keep an eye for your qq Post
Rogues are very good on the PTR- as a class for duels. As far as arenas goes, any decent team that can stop dance has no problems with rogue, coupled with the fact that you take as much damage as a training dummy.
Damage is king on the ptr and mages are the undisputable kings of kings. Burst on general on the PTR is way way way too high - every class can pull crits for 120k in full tyrannical. At best rogues are mid tier. Top tier are mages (both fire and frost) and unholy dks that are the best melee now. All the rest are more or less equal. I was expecting that 5.2 would be the god of patches, but it seems more like a new s8.
Again the damage is beyond the charts now - with the new buffs even rets can crit for 160k (I got hit for that today in def stance with 67% res), boomkins casually crit for 140k, wars get random 120k slams, mages kill you in a deep freeze from 100 to 0, monks started hitting for 100k's, rogues can get some random 100k eviscs, you can't even think about dispelling vs a lock, now that powershot works hunters can casually hit you for 160k. The only good think in this patch so far is that all the healers seem more or less equal.
TL;DR don't get your hopes high for the season unless they nerf damage by like 30%