I'm not certain on that, I'm sure they have because they still have a working elevator, but we've probably just never seen it. The escalator is still there too behind a door in the rather nondescript orange hallway between the attraction's queue area/entrance and the gift shop and imageworks. The door is locked, but you can reach through the chain link door, push the bar in and open it, but there's actually nothing up there behind the black curtain as I found out, it's just a wall, nothing else. Guess it was a deterrent because some people kept getting up there easily to explore imageworks. Makes me now wonder: because 1) the second floor is still in use, 2) the escalator is still there, and 3) the top of the escalator is blocked off. Would it be easier or make more sense just to remove the escalator or some how put it back into service? Okay, well for the latter, we'd need TWO escalators, and I don't know where it (the second escalator is) is or, more importantly, IF there is one.
Unfortunately it isn't easier. From photos I've seen and info I've heard from CM's, it is walled off from the DVC lounge. I'm certain you can access it still, just not up the stairs and around the corner. You probably would need to access it via a restricted area or some other way. If someone had a floor plan of the pavilion, maybe you would be able to determine a way to get up to the second floor's imageworks. Just my 2 cents.