When using the playback speed function I can notice a change when I slow down the playback but when I speed it up it doesn't seem to be going any faster. Am I doing something wrong or is this just my mind playing tricks on me?
Your mind isn't playing tricks on you. This is a bug that has been around since 1.4.0 and is logged as bug #12299. Our intention was to fix it for 1.5.0, but due to complications that arose with implementing Frame Blending we had to keep it the way it was.
The frame blending is great. I put an updated fixture next to one with last version...what a drastic improvement. Is there a work around on the Playback speed or is it what it is for now?