Question, why does Bard and Machinist share the same core mechanic?

[NaesakiAshwell]

People exaggerate the movement impairment GB gives too. Guess it helps them make a point?

I notice in pre-52 dungeons a lot of Bards love to run and jump around while using their abilities think they are really ace, so I'm guessing they are one of the vocal crowds crying about having to stand still for brief periods >.>