This would be great for the demigod community and also help take off some of the stress off of matchmaking. In DOW2 (well the beta not sure about the full game since i never bought it) There was a party system at the end of the game during the score screen players were able to party up if they liked playing with eachother so they could stick together on a team for the next game. In turn not only could you always have a team of competent players that you liked and had a good connection with you it also cut match making time in half. Just like DOW two if you could add a check box beside each players name on your team (hopefully they didnt disconnect at the loading screen)  It should match you up already for the next game with the nat system since you already know your connection is stable and hopefully you and that person already get along and form up some sort of strategy. If you think this may cause balance issues you can make it so a your party of three matches with another party of 3 which could probably cut matchmaking in half. Only flaw to this is I can see people getting disconnected and breaking parties do to stuff like the loading screen dc's. This happened in DOW2 all the time but they also had a system so you could see who you just played with and you can reinvite them or friend them. Oh and finally you should also be able to party up through your friends list. I could go on forever on how you could make this work but im tired and going to bed.