Each Adventure is site based, with a gazateer detailing a unique Setting for each, connected loosely with a hub zone for interdimensional travel
Each Subsetting could easily be a wile campaign, and they are pretty great.
Yup, the Ghostblood books are going to be Mistborn Era 3: 1980s Edition. Era 2 was anachronistic 1870-1930 pulp stuff: guns, trains, cars, planes, UFOs, ancient jungle temples, sitting room mysteries, superpowers, etc.
The upcoming Ghostblood trilogy by Brandon Sanderson is going to be an interesting question of genre definitions: the setting is 1980s Cold War like tech level and social structure, with computers and cars and such, but is fully secondary world.
You are being overly literal about a standard term of convenience: "Urban Fantasy" is less of a mouthful than "non-secondary world fantasy set in a contemporary context familiar to readers except with magic".