I am putting this as a bug because... well because it defies logic, and as such it is a bug.
When keyframing an animation (in other environments), there is typically a setting for speed... so 24fps, 30fps, 60fps, etc. With Spriter (so far), if I want to change animation speed, I have to reposition each frame on an unmarked scale... which means i have to get out the bifocals and count the hash marks vs. reading the numbers (that arent there). I know it is alpha, but that's pretty much floor level stuff. I get the feel you want the interface to be number-free, but that just isnt reasonable.