Oddly enough I find the track pad on the Surface Pro 4 keyboard to be the absolute BEST track pad I've ever used on a PC (even better than the one I played with on the Surface Book) which is...just absurd and odd. But hey I thought it was interesting just how much I liked it compared to everything else.
I found that the gestures were odd, coming from a MacBook. I also notice that my MacBook's touchpad (whilst great in macOS) being absurdly dumb when I reboot to Windows on the same hardware.
I think you sum it up well - there are some rough edges in the Windows world, but there also are in the Mac world. I find I hardly use my iPad now.