There definitely seems to be a weird weighting towards Warman/Wanuskewin Rd vs. a major highway in Highway 11.
Here's my super rough idea of what I think might work better with the 2 interchanges being in play at Highway 12 and 11 and a minor interchange w/lights on Warman/Wanuskewin Rd--that road is already littered with lights with another set on the way soon with the latest work they're doing as it's not a freeway. This keeps the flow of Highway 11 the same (with the ability to go North to Highway 12 which doesn't exist now), Highway 12 the same (with the ability to go East to Highway 11 which doesn't exist now), more-or-less keeps the path the same for traffic coming into the city off Highway 11 to Warman/Wanuskewin Rd with a SAFE highway crossing (i.e. flyover) and almost the same for traffic leaving Saskatoon to Highway 11--the eventual plan to continue Warman Rd North of Highway 11 could still happen as well and could even keep the existing road and exit onto Highway 11 North/East so you wouldn't need to go on the freeway to get onto Highway 11.
I would also make Highway 12 come straight in with another overpass over Highway 11 to get rid of the weird merging that happens there, and remove the 71st st crossing--way too many accidents there. An interchange at Marquis would obviously help take the pain away with that change.
Anyway, just brainstorming
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