Yes, it's a bit of a double edged sword with Little. His delivery funk helps him hide the ball and probably generate movement, but it comes at the price of a lack of repeatability and volatility on any given night.
It's that ability to harness funk that makes a guy usable. Marmol didn't have a funky delivery per se, but his slider was about the best I've ever seen with late movement. It wasn't until he learned to throw strikes with his fastball that he became a good/great relief pitcher.