ED on PC doesn't support the gyroscope (headlook) or the trackpad on DS4, nor does it differentiate between short and long press for button modifiers. It also doesn't show me the PS4 symbols, but rather the generic [Joy 14 Button] descriptors, unless I enable the extra Steam support, which makes ED think my DS4 is an XBox controller, thus displaying all sorts of strange glyphs not on my DS4.
I can understand the lack of trackpad and gyroscope support but long press for modifiers is strange. I am 100% sure it works on the Xbox controller, so I see no reason why they shouldn't support it.