Holy has Chastise, but they must get into red chakra (which is a decision which sticks for 30 sec).
MC is a gap widener / CC like Void Tendrils and Psyfiend.
Disc currently suffers from a reverse of the shadow issue:
Shadow is bad in PvE, good in PvP.
Disc is bad in PvP, good in PvE.
Touching the spec to fix one content type will affect the other content type.