If there was a better, more "linked up" MUP, my BF and I would ride it.
The Fanno Creek Trail (all 4 miles or so of it) is so disjointed, and crosses several busy, large streets, that's it difficult to want to use it.
I'd rather ride Hall and Scholls Ferry than the Fanno Creek Trail, to be honest.
If there was a 217 commuter corridor with decent crossings and a nice wide clean surface, I'd use it in a heartbeat.
I can't believe you ride ON 217! You're crazy!