Templates feature, new guided tours, and lots more!
I love the "Timeline bar: preview timeline when using the toolbar buttons to cycle through keyframes" as well, but imo it should just always preview the state at the current scrubbing position in edit mode. The only way to see the state between keyframes is by pressing play and pause (afaik), which is awkward.
If you press Ctrl (or Cmd in Mac) while scrubbing, the timeline is previewed.
omg, I feel stupid now, thanks for letting me know! For some reason I must have missed it when reading the shortcut documentation.
I still think it should be like that as default, but knowing this helps a lot :)