I think it is a shame that they did not keep more explicitly to the "spirit" of what an a'dam is. The point is that the a'dam knows your intention - you cannot pick up the water pitcher and then just straighten out your arm and oops! you hit your sul'dam. What a shame! It knows that you are thinking of using the water pitcher as a weapon so you cannot touch it for any reason until you have convinced yourself that you would never use it as a weapon. You cannot wriggle out of it with lawyer like legalese.
For example, if Egwene was only hanging the a'dam up (being tidy), she would have to be completely convinced that she was not harming Renna. She cannot just ignore that aspect. Plausible deniability is not enough. You cannot just re-frame actions as not harmful in your mind, you have to really believe. And if she really believed she wasn't harming Renna, why would she do it? To be able to collar Renna as marathe'damane she would have to completely believe with her entire being it was the right thing to do. Not just pretend that she was not trying to escape and would kill Renna in the process.
I cannot really blame the show - the forums are full of people that think they know how to trick the a'dam, that they could lull it into a sense of false security and then kill/escape/commit suicide. They completely ignore that the a'dam is inside your head and your intentions, the dehumanization, the conditioning, the psychological damage of essentially unlimited torture by someone that has access to your deepest fears and phobias - to just say, oh, I'd get out of that easy.
The saving grace for the show is twofold, I would say. One, it was absolutely freaky to watch and was a fitting climax to the "Egwene is a beast" arc (which we have sadly seen very little of this season so far). Two, it appears to play on the Seanchan presumption that sul'dams cannot channel. I don't really think this is enough - the a'dam is not that specific - it is not programmed with set parameters and exceptions - resistance, rebellion, and disobedience would still be crushed whether the sul'dam could channel or not. The a'dam have no sense of marathe'damane. But given how common the idea is that the a'dams have a loophole in the fanbase it is difficult to hold the show too accountable for having the same feeling, even though I am totally against it.