I spent some time thinking about it and I'll spend more time 
exploring all the possibilities in that direction after the release 
of preview 7. This really looks interesting, but also fragile (i.e. 
even with menu offsets, any update to the software in question is 
likely to break it - as are in the case of different versions that 
are in circulation - I did, however, not yet explore UI scripting to 
its full extent, so my judgement shall not be regarded final ;-).

It's my goal to keep the BCK and the "user" interface seperate from 
each other, so while I think a replacement action window would be 
great for the scenario of a broken UI script, it's probably nothing 
I'll do since I, as you, fear it'll confuse far more people than it 
will help and it'll also break the "seperation" of those two parts of 
the app.

Best regards, 
Felix