There are some X-Men formulas that would work on TV. For instance, the original 5, who didn't have extremely visual powers, and used them sparingly as well. The current X-Force and a made-for-tv lineup of current X-Men could also work. Exiles even.
But New Mutants?
You have to pay human torch money every time Sunspot or Magma lights up or Cannonball does anything.
You have to pay top end Smallville money every time Meltdown does her thing.
You have to have full werewolf costume and stunts every time Wolfsbane does anything.
This is in addition to Moonstar's glowies and anyone else I've forgotten. New Mutants are expensive. Too expensive for TV, imho.
And don't even think about the New New New Mutants with their electric speedster, dust girl, and so on...