I've read most of the comics since Magik became a member in the 2010s and Magik is still more of a New Mutants staple than a X-Men member. I don't see her as essential to the X-Men team as Psylocke, Jubilee, Emma, Polaris, Banshee, Havok, Forge and Bishop. Just like Cable is more of a X-Force staple than part of the X-Men team.
New Mutants (if splinter teams are part of Mcu's plans) could be the first X-Men spin off team anyway. Also, like I said, Bishop, Polaris, Psylocke, Emma, Jubilee, Havok and Banshee are more essential to the X-Men team than Magik anyway, so I'd rather see those mutants than the ones who appeared in the New Mutants movie (this includes sunspot who was in dofp).