OK so I already posted (I think?) the idea where parameters would get a green or red or whatever light next to 'em if it is controlled by an (active) metadevice, now, I thought of something else.
What if, when the cursor is on a non-zero effect column where the first letter x is a device (1<=x<=Y), how about that device it’s pointing to lights up, or even, a shortcut key to => ffwd jump to that device (so focus dsp chain, select device concerned)??