Hi to all!
No it does not!
I totally agree with EGIE. its a Problem when ID masks are blured or unclear on egdes. speculating how many pixels are needed expand to fit the the selection. I would say its an industry standard that you should adapt to, to keep the ball rolling. You should listen to people daily workflows othervise they will turn to other softs.
650 bucks yearly to me means: "thanks for taking your time and leaving your valuable feedback, and we will try to improve" not " What do you need it for anyway, just trace the objects individualy with magic wand tool" answer... btw I never had similar problems with V-ray.
I agree with Micha here, using a tolerance usually does the trick.
In a previous Enscape version we had the masks without AA. You always had stair-egdes, no matter which tolerance you used so the results were bad.