I think it would be pretty awesome if 343 made the next halo wars game more squad based, like XCOM: Enemy Unknown. Build your own Spartan IV squad and go out on missions like Spartan Ops in Halo 4. After the mission you can upgrade your Spartans' armor and weapons. However most people I've talked to can't stand strategy games and only play FPS. And so I doubt 343 would make another strategy game, seeing as most people wouldn't buy another Halo strategy game because it's not an FPS.
Thoughts?