Thank you for the clarification about the farm landuse in the west. If they're crop fields that are intermittently used as pastures then farmland seems to be the best tag for that. Though I also think the tagging channel in the OSM US Slack server would have a field day (pun not intended) trying to figure out how to incorporate both meadow and farmland tags into one to indicate what they're used for often differs.

Just a note about the highways, I did initially plan on creating a discussion for the highways I changed, but ultimately decided against it since I didn't want to make a convoluted proposal that would end up without a consensus and thought they were uncontroversial enough to not really need one. I did however decide against upgrading the Boise/Mountain Home - Elko route to trunk since that is undoubtedly more controversial and would also require getting in touch with Idaho editors. I will probably make a Slack proposal for that later on to see what others think.