It would be nice to have the ability of creating a party and choose one or two of your teammates to be bots. I believe this will also help lower Predator queue times as there would be, technically, more Fireteam players.
Also it would be nice that in the party system one of the players, if they want, can opt to play as Pred against the others with either random players or bots, without the need to use private matches.
Sadly, being self-hosted, private matches are a nightmare to play with people split across the world. Being able to use public servers help this tremendously and is more fair/stable for everyone.