I still don't understand why Reva is OP

Reva should be heavily nerfed because what cg is saying is Reva is stronger than Luke, anakin, sidious, revan, maul the list goes on

I don't read too much into the relative strengths of characters in this game when compared to the films, books etc. Older characters tend to be weaker and the newer ones stronger. That's how power levels move up the gears.

You've mentioned Sideous. He's at best average these days but was powerful in the early game.