Fantasy time:
https://imgur.com/gallery/5kZ0t9U !
Disclaimer: I didn't draw this to scale.
The major changes that I made to MTO's drawing are as follow:
(1) extending Goodview Road to the planned roundabout to improve EDR for Highway 69 (400);
(2) modifying Highway 17 (417) Ottawa-bound offramp accordingly - all-way stop where it intersects Goodview Road Extension;
(3) another roundabout across Highway 17 (417) so traffic on SSM-bound lanes can access the EDR by going through both traffic circles (and vice versa).
In all surprises (even to me), it only took me at most 45 minutes to draw this. (I was expecting to spend 2 hours on it.)