A useful feature would be to have an option to have larger slew buttons, or perhaps separated with a wider line? In the dark its very easy to hit the wrong button when peering through the scope or camera screen to align on a star.
I know there's the tilt to slew feature but I find its precision lacking when aligning so don't use it.
Another option would be to use a 3rd party BT controller with proper control sticks (which I think others have suggested).
Thanks.