It won't be Mission Control itself, but something it's enabling that wouldn't normally be possible. The Switch is already quite limited for bandwidth with Bluetooth devices. I can perceive noticable input delay just by having a controller...
Probably not in the way you're thinking. Mission Control doesn't make use of the IR data from the wiimote. The main issue being that the Switch hasn't been designed with pointing in mind, so there is no way to feed it the data without replacing...
This was just a quick build to stop people complaining about the old one not working on 18.0.0. The zip doesn't contain the ble_pair app required to connect BLE controllers like the pinned ones do.
It's done, there's a pre-release on my discord server. Just waiting for confirmation that my patches for pairing Wii/WiiU and XBE2 controllers are working correctly. If you've got any of those you can help speed things along