CronoDragoon wrote...
War assets seem like a secondary consideration here, with the heavy lifting being done by altered story sequences. For Control, it would have been sufficient to allow Shepard to agree with TIM that controlling the Reapers is a means to victory, but possibly disagree on the path to get there (experimentation on civilians) and/or who ultimately will control the Reapers (since TIM is sure to mandate himself).
When he shows up at the end, some of the Renegade choices are less about "control is hopeless" than "you're indoctrinated and you'll never pull this off," as well as the "you've sacrificed too much" line that I think Shepard says no matter what. It doesn't really foreshadow the eventual choice the way it could or should, but it is there.
I wonder if part of the reason that the endings feel so dissonant is that decision-making in Mass Effect followed a fairly consistent system that suddenly got thrown out the window. It's usually Renegade if you agree with The Illusive Man, choose options with high collateral damage, and assert Shepard's immediate priorities as more important than anything else. It's usually Paragon if you agree with Anderson, minimize the immediate loss of life, and avoid dragging bystanders into the middle of the conflicts at hand. Then, all of a sudden, you can agree with Anderson and get all your synthetic allies killed, you can agree with the Illusive Man and not get anybody killed, or you can pick Synthesis and impose a radical change on the galaxy.
All three involve Shepard assuming an enormous amount of power and influence over the galaxy's future (i.e. somewhat of a Renegade tilt). And if you've been mostly picking dialogue options consistent with your general philosophical outlook, you might find yourself considering a choice that your Shepard seemingly wouldn't accept based on past statements.