I have a FaderPort v2 and use Studio One. I like the 'link' mode as turning the control is much better than making very fine adjustments with mouse.
There's however an overlooked place when the 'link' mode doesn't affect the control under the mouse: it's the item's volume. Yeah, that blue square at the media item. It's very finicky to adjust by hand and being able to use FaderPort for it would be a huge relief.
Please make the item's volume controllable with the 'link' mode of FaderPort!