Hi would be good to have the split tunnelling on the router level and be able to only have the VPN on the devices plugged into the router and not the wifi or visa versa. That way you can have the VPN only on the wired devices eg a Roku box plugged in you can connect with wireless devices and bypass the VPN. I've found that the VPN slows down my 600mps connection down to 15mps and it's only needed for my Roku to watch BBC Iplayer so slows down my other devices when it's not needed.