You have sort of wandered in the direction I was intending for discussion, as you obviously tried to do, or are aware of things AjaxAmp cannot do.
AjaxAmp is sort of arbitrary for the topic, only relevant as-in it is a working addon (if limited).
I am more interested in brainstorming ideas that make Winamp indispensable to anyone that also uses a mobile device.
I am not talking replacing Kodi, but thinking more;
"Wouldn't it be cool if you could easily...."
...translate multi-touch events into a convenient way to control 2 Winamps running together with a DJ-mixer DSP ? (DJ-Hero plugin+app)
...Control Milkdrop and AVS from your device via sliders and knobs GUI, mapped to the various key-presses ? (VJ-Hero plugin+app)
There must be other ideas that have never been "a thing" due to a previous world of separate devices and software.
I think device integration and fluidity is the way forward to keep Winamp relevent down the road, so an API that has the scope to encompass more than just play music will be a major boon in these wilderness years (After-all that is what WACUP is).