The splat rollers are mostly fine and manageable. The Carbon and Dynamos are overpowered, an easy way out and OTT. The range, damage, swish/flick speed and spread of ink borders on ridiculous. Think of the Dynamo and Carbon rollers as Smash Wii U's Diddy Kong pre-patch, only the scrubs who aren't good enough to use a reasonable and fair weapon which takes a bit of skill chooses those options. In terms of weapons an obvious blight on what is otherwise a reasonably, but not perfect, balanced game.
Luna Blaster Neo isn't as bad but still annoying, wouldn't be against a minor nerf.