(above) Still can't find an answer online. I do find tables comparing cable pull ratio for rear derailleurs, but not front. And even on the table for RD, there was this statement at the bottom:

"Shimano 11-speed groups do not have any published data regarding derailleur ratio. The (RD) ratio listed was calculated by measuring cable pull and cog pitch and solving for the ratio."

But again, that still does me no good as I need the ratio for Shimano 11-speed road FD versus "standard" 8/9/10 speed Shimano FD ratio.

EDIT: I think I can do what I want, use a gripshift 1-3 shift with FD 11 speed to achieve lower shift force on a 1-2 2X shift. All I need is that the 1-3 shift pulls equal or more cable than is needed for the weird long-arm 11 speed FD, I think it's gonna pull more than is needed. Then, I adjust "3" to a perfect (cable pull) shift onto the 2X big ring, and when I shift to "1", I'll adjust the FD low ring stop to where it should be for the inner chainring, then any additional cable offered by the shifter will just make the cable go slack, not an issue if not so much it tries to buckle the cable or pushes the cable housing out of the road FD adapter.