here are some points that would make the animation tab better in my opinion

1. instead of frames keyframes, just like in blender or blockbench and changing the animation menu to a timeline with seconds
2. an option for changing the scale of cubes while animating it

if i'm not mistaken, the latter is already possible

The first is planned, the second you can already do that use the Render Scale option while animating.
Duplicate of #192