Yes, your plan is a boring one. No offense.
I just came home from Salt Lake while returning from NAFO. I sucked it up and took I-80 to Winnemucca, then headed north. That got me up to Hwy 140, which I loved. Great, great ride, especially once you got into Oregon. Took that to 395, went north to 31, took that to 97 in LaPine, south to 58 via Crescent Cutoff Road, then north to I-5. SR 58 is another beauty all the way up to the Springfield area.
Here is a map link:
Ditch your map and follow this route
Not sure how long you have for this ride. I did most of it in one day, but it was a long one. (I had gone Golden, CO to Wendover the day before and started from there at 5:30 a.m. PST. Got home to Portland area at 7:30 p.m. PST)
If you go this route, or at least take SR 140, watch out for the wild burros. Seriously. There are a lot of them out there on or near the road. If you miss them, I suspect that burro poo is slippery if you hit it and there's plenty of it on the road at times. (I had pics of these guys, but somehow managed to erase my NAFO return trip photos). I would also plan out your gas stops. Denio has gas, but only premium right now and cash only. There is gas in Paisley, but no too many other places on SR 31.