VIA, as you mentioned, is one of the niftiest I've seen.

I just wish that VIA was a bit more robust, particularly around macros... I want to do something that does separate key down and key up events with pauses between. Unfortunately, VIA doesn't do that. And worse, my keyboard (Keychron K3 Pro) doesn't yet have a public firmware build for QMK, so I can't do it directly in there either...

(I'm trying to write a macro for blanking the screen in macOS. Normally this is ctrl-shift-eject with eject held for a brief moment, but a macro of that rarely works from VIA. It needs a little delay at the end. If I add a no-op key to the end it then works, but also leaves ctrl and shift stuck down until I manually press each of them, which is no good.)

</digress>