Wonderboy - I actually disagree.
I personally also prefer the double casting, but if you're doing it withi a large group, I think it works just as well to split it up and add more roles.
I think the show is written to make the parallels soooo obvious - they're like a slap in the face IMO, with the wording for scenes being exactly the same, how could you miss em'? I don't think the double-casting ruins or enhances that at all really, ti all depends on the director - it can be missed if you don't handle it right and don't double cast, or it can be way too much and cheesy if you DO doublecast and just do it wrong, y'know?
If I show you the darkness I hold inside, will you bring me to light?