I would probably keep these terminal roads down at secondary just because they are important roads but not important through routes/arterials like Russell or Paradise Road, and only serve airport traffic.

On another note, I recommend avoiding tagging roads like this one (https://www.openstreetmap.org/way/204632888) as links. 'Link' is a very ambiguous term as it could be interpreted as anything in the scop of roads, but in OSM, this refers to almost exclusively unnamed roadways such as exit ramps, right and left turn slip lanes, and median breaks that focus on providing U-turns. This sort of road I linked is better tagged as a service or unclassified road.