My issue with this route (other than I80), is the road around Rockport Res has zero shoulder and is usually very busy with trucks hauling boat trailers on Saturday afternoon (when most riders would likely be riding here).
I have no problem riding that section, but I would not advocate using it on a perm because I think a lot of riders would not be comfortable riding there.
You could bypass that part by going on the rail trail, but then you have uneven surfaces and it becomes more of a gravel ride.