It seems to me that Bruce and Ruppert can and will decide to do whatever they want regarding the style and design characteristics that they would like to present. Given that the terrain is slightly less abrupt or severe, I suppose the routing among the contours out there offers more options to go in various directions, or by the same token, allow them to confine more to a narrower tract of land, depending on what the perimeters are that Ruppert wants to maintain. I'd imagine if they can melt down to a certain degree to eliminate the severity and cut down on blindness, they can also build up to match contour if there are areas that they'd like to enhance playing corridor elevation and contour. I think Bruce has a great understanding of how to create that sort of feature shaping, either way.
As far as whether Bruce wants to design a style that is notably different or seamlessly blend into the style of the original, that is also something I'm sure Bruce can achieve as they see fit. He has the skill and understanding to work in the Doak-Renaissance philosophy, along with the imagination to go different if he wants. I've seen his styling in bunker resto and remodel that is artfully crisp and stylish, and he obviously had great input in the rugged and naturalistic styling that exists at BallyNeal.
The question for me boils down to whether they want a seamless course in style (where possible cross-over from old to a new loop of routing can happen with playing style integrity) or maybe a more sporty, shorter, or longer one, to offer different pacing of play, and a course that plays more amenable to a public clientele.
Prairie club clearly has two styles of course slope and rating, along with different terrain charcteristics. At PC, there is no actual cross-over for routing. You play one course, and enjoy its style and degree of difficulty and routing, and then you go to the other, with separate set of characteristics. I suppose Dismal River has the same set of considerations.
I just can't imagine any of the long time Renaissance associates not being able to reasonably emulate their mothership's styling-design philosophy, or go their own creative direction, depending on client desires, and what makes sense for that land tract. Turf selection and maintenance regime may make a big difference in design approach, and there is where I'd be interested in what Ruppert and Bruce may cook up.