I think that if Samurai players were really passionate about Kaiten, then by all means, bring it back.

What I don't respect, though, is the argument that SAM should have an even bigger dps lead over other melee jobs because it's so much more 'complex', that we constantly saw touted on the forums and reddit during 6.0. If you make that argument, you're pretty much begging the dev team to simplify your job and then nerf it back into equality. If you're content with the gameplay on your job, then it's best to lay low and let jobs that actually need the dev team focus get it.