I will say something before it is too late, using the directional keys to navigate is simply the best thing in Aseprite, I’ve been using it for far too long and that is one of the most useful feature Aseprite has.
I’m not saying you guys should “deal with it or beat it”, even if this function would be implemented it would considerably hurt your workflow while animating(it is the most pressed key while I toggle between frames).
This is coming from a former photoshop animator, I’ve been using Aseprite for quite a while now and sincerely its user experience is far superior to PS in practical terms for animation.
I know that whenever we’re migrating to a new software that kind of “breaks” our previous stablished workflow we feel the urge to change the new “workplace”, I myself recently been struggling moving from Autodesk Maya to Blender, but I guarantee that when you guys get used to Aseprite you will get to see it was made for Pixel Art and animation, and it does a great job of it.
I only hope it didn’t strike as a rant or anything of the kind, I’m just trying to be helpful and reasonable.