What are you talking about?
They hotfixed gurth on live for rets because rets were proccing tentacles with seals + judgement.
Warmane devs still haven't fixed gurthalak procs correctly on Retris; they still proc tentacles with Judgement and Seals (SOR).
And yes, I remember testing out scarabs + divine storm with AOE seal to check if Retri. tentacles were ever fixed and this is the result: (note this was for testing purposes)
As for tentacles with bladestorm + scarab, yes, it still procs around 8-9 tentacles.
Scarab + AOE is clever use of game mechanics if used in the right situations. But if we're talking about the bug seals and class, then it counts as exploiting a game bug.
BS/SS + Scarab is use of game mechanics
SOR + DS is exploiting a bug in the game.