Or... you could simply build a Wellington-aligned DRL like this:
I think you guys might be overthinking the whole crowd dispersal thing. A transfer station need ever resemble the chaos at B-Y with a platform layout that maximizes space and access points. CBD Stn ergo would have both a very long and broad island platform as well two flanking bay platforms. Making the station box wider naturally encourages people to move down the platform area while awaiting trains, lessening the chance of bottlenecks at any given point with even seating lounges in the non-service areas of the platform. Also arriving trains would open on both sides, segregating offloads from boarding passengers (offloads onto the island, boarders from the bays). The TTC is living proof that duo-stations to dissipate crowding at any one point does not work (see: McCowan-SCC; Ellesmere-Midland; Spadina-St George; Bay-Yonge; University Line in contrast to lower Yonge Line). And if you'll notice CBD Stn in relation to all 3 of St Andrew-Union-King is of uniform walking distance, so no inconvenience to transfer to/from any point.
But you guys are perhaps missing one major function of the DRL, that the downtown doesn't begin and end at the YUS loop and it's those forgotten areas that need mass transit the most. A station at Scott negates another stop eastbound til Sherbourne and at Duncan, not another til Spadina. The gap between Spadina, Univerity, Yonge and Sherbourne is just to broad to have 3 stations be sandwiched so close to eachother when if you spread them out further, whole new customer niches can be catered to. Just look at Google Earth and the number of condos affronting my Entertainment District and St Lawrence Market Stns. People entering the club zone or bound for RioCan/CityTv building would also find this spacing more practical. Likewise George Brown students would be within easy walking distance of a station at Jarvis/Front, and maybe even a PATH link can connect them directly for the winter months.