Disclaimer, I've not used Piplay or updated in Months so I might be wrong.
Personally it doesn't bother me as much as it will bother every professional reviewer reviewing it.
Well on the good news @jonnypanic has done some good testing of vr interfaces & has reported Viewport works well even i recall better than steamvr for launching & adding titles.
But yeah piplay could use some tweaks & a vr launcher
Viveport, yeah. Good for keeping all of your games in one place and launching them. The new Piplay UI looks ok but won't launch revive games.
Wait, Pimax will work with viveport?
Viveport is just a UI for launching SteamVR games, so yeah. Both the desktop overlay and VR menu work fine, but you need controllers to access the VR menu, there is no xbox controller support.