Granted that I haven't read comics in 20 years, and I know they shifted "mutants" to "inhumans" for new folks, but I ever really thought of the Royal Family as that important or fun. They were folks who needed help from Fantastic Four or whatever to solve problems, not folks who went out and helped others. I would really rather see other characters first by far (especially Antman & Wasp, bump Inhumans to the pits of Gehenna for that.
I'm sure Inhumans have their fans (hell, even Aquaman has fans...), but their story never really did much for me.