While I think Jasper rivals Highlands as one of the great golf experiences in Canada, I think Banff is likely the better of the two Alberta courses. But the problems are many. The bunkers are a disaster -- in dire need of a facelift and about six inches of sand removed from them (a man could lose his shoe!). The rerouted course really takes away from the experience, and though it isn't exactly part of the course, the existing clubhouse is gawd awful.
And while the mountains present incredible vistas, Banff is relatively flat in comparison to Jasper, which skirts the mountain edges and even wanders into them in spots.
In regards to the Cauldron, the green has been changed and has always had difficulty growing grass given the lack of light from the nearby mountain. The tee shot is also changed -- it used to be lower and down to the right. You can still walk down and see it -- the bunkers flank the green from that angle.
I'd be guessing Jasper is a 7 for Doak and a restored Banff would be an 8.