People are overreacting to nin. I'm sure a lot of testing was done damage wise in comparison to mnk. If anything, drg should be brought up damage wise in comparison to where mnk is.

I will say a very good nin will also have really good dps in long fights and it might take longer to catch a nin in damage over a long fight than a drg for a mnk.

I see it like this, drg has really high burst damage, mnk has really high sustained damage. Nin is in the middle.