Edit: (12/5/2014) Doing some tests with blog pages for a bit. You may see the side bar change here and there for the next few weeks.
I've had suggestions in the past about adding in dash buttons, so those are in DT3 now. The biggest reason I added them though, is I feel that dashing is the most important mechanic in the DT series. More options to access and set up the dash how the player wants it is a good thing then. (And the arguments to add it were also well presented.)
Up/Down + Jump can still be used of course, but with the dash buttons, the option to disable up/down from initiating the dash was added. The dash buttons also have 2 modes. You can set them as 'Dash Left' and 'Dash Right', or as 'Dash Back' and 'Dash Forward'. For controllers, they are default to the shoulder buttons.
During all my playtests since this functionality was added, I've kept to the old method of dashing when playing on a keyboard, but with a controller, the new method is far better. I'm sure any of you reading this that played DT1 or 2 with a controller will immediately understand why.
One more major level left for Chapter 19, and 3 more boss encounters. (Scripting one now.) The sequence to get to the location that Chapter 20 takes place, where I mix two mechanics together.
Here's some MLP thing out of nowhere.
Also the blog has been linked on reddit apparently.