Definitely smoothing out the actions, and not requiring a click for each card drawn to make it move faster. Also, not being forced to fold if you run out of tokens during a hand, as being forced to lose when you should just be all in is rough.
The current build that will become version 2.0 now has both the All In Feature and a setting under preferences to toggle the deal speed. It has normal, fast (which is x2), and instant (which isn't actually instant but is at x10) the result of the faster speeds is you don't always get the card deal sound. But I feel like that might be fine.