I'd say bide your time until the expansion is out. The AI's behavior in unlocked teams is just annoying adn there's no way around it, and in multiplayer people just form 3v1 scenarios because there only needs to be one loser in unlocked teams.
Sins is a real-time-strategy game (RTS) as opposed to a turn-based-strategy game (TBS). There's not too much that can be done to change its nature.
However, that doesn't mean that it isn't a great game. For the best Sins experience I recommend playing 5v5 pug matches (where two captains pick the teams, resulting in balanced teams) in online multiplayer. No worries about facing a 3-on-1 since you have allies and if you are facing that, it means that the rest of your team gets to play 4 on 2.
