Well, I dunno, Adrian using the Watch on some girls also might be that... who knows about what that meant though.
As I say, it's subjective.
The watch has the potential to make hot things happen; Adrian wielding it currently acts against that. Certainly if he uses it on what currently seems to be a phantom Echo (an echo of Echo) then that would seem to amount to nothing. I've really no interest in Adrian as a character: I don't identify with him and I've no interest in men with harems any more than I've any interest in men with guns or men with cars.
Ultimately I'm interested in women falling victim to mind control. So Erin having a love spell cast on her, particularly as part of a trap engineered by either Cherry or Jakob, is hot. There's something at stake there. If Adrian is actually going to turn into Jakob - if Adrian with the watch starts to represent something other than the gateway to the lovey-dovey harem, then that could be hot too. But that's nothing to do with Adrian per se; it's to do with what it means for the women.