This has me intrigued to look into some Inhuman books...There is also another problem. They don't have any classic stories in their catalogue readers who are excited about a character or team dives into their past to read more.
They've always been relegated to isolation or heavily reliant on Terrigen Mists. They aren't even a united group, it's mostly Bolt out on his own with Medusa explaining his feelings as that dog sits in the background.
I'm hard pressed to even think of what their powers are. They are cardboard flat in terms of personality. Past collections wouldn't even reflect new personalities they receive from new writers.