It would be a nice touch to the interactions department if we could change transitions timing on a global level. For example, when you build a custom nav burger, you'll end up with many steps and triggers to get the animation. Sometimes you'll end up with an animation that is too slow or too fast. To change that you have to go into every single step and change the timing one by one. Quite tedious.
If I haven't completely missed something here....that would be a good and convenient addition.