I didn't like the RTS part all that much. There's very little challenge there apart from making sure to send many Fremen and equipping them with the best weapon

I didn't like the RTS part all that much. There's very little challenge there apart from making sure to send many Fremen and equipping them with the best weapons you can capture. I recall deliberately trying to lose in the RTS section section and not managing to. You can either fall behind on Spice shipments and get annihilated by the Emperor (until you somehow could beat him) or lose Paul directly, but AFAIK there's no way to lose in the RTS itself. That did give me enough time to explore the map in an Ornihopter - best part of the game IMHO.