These changes look to have caused some cycle routing softwares to push cyclists into the Sharpes corner roundabout and highway 20 spur headed into Anacortes. Sharpes corner roundabout was designed as a high speed highway interchange roundabout and isn't suitable for the vast majority of bicycle traffic, which is why both Anacortes and Skagit county designed and built alternative infrastructure in the area as part of the Sharpes Corner roundabout conversion for that purpose. 

It's a little frustrating that the city hasn't added this to the bike/pedestrian map, but instead posted separate maps here (individual routes for directionality of roundabout bypass travel linked separately once you scroll down):

https://www.anacorteswa.gov/1001/Pedestrian-and-Bicycle-Routes

And here is a link to the Skagit county bike map showing the shoulder cycle lanes and shared use paths added as part of the roundabout conversion, including along March's point road, which I believe is the section of shoulder bike lane missing for cycle routing of USBR 10 up to the Tommy Thompson to occur properly.

https://www.skagitcounty.net/GIS/Documents/Parks/Bike Map.pdf