Hey guys. I just tried this and it is working like a charm for me so far. I’m on PC so I’m not sure if this applies to the console crowd, but it doesn’t hurt to try. I found this while searching for a KI matchmaking fix (KI crossplatform matchmaking used to take forever!).
Just Google how to set up a Teredo Adapter on your PC and the version of Windows you’re using. It has something to do with how your online connects to IPv4 and IPv6 (don’t ask me to explain). After doing this, both KI and SFV are matchmaking so quickly now. Its like a whole new experience. I hope this helps some of you guys!