I think it should've been destroy and control. This is how I personally would've done it:
Get rid of the Starchild, get rid of the Reaper motive of trying to prevent war; just keep them as Lovecraftian horrors from the depths of space, and just have destroy and control.
Control's success depends on your support of Cerberus. When TIM reaches the Citadel, he changes stuff in the systems that allows control to become viable. If you've been helping Cerberus to some extent (keeping the Collector Base, allowing project Overlord to continue, etc), then the chance of control being successful increases.
You pick destroy if you feel you've done enough to ensure peace in the galaxy (a cured krogan ruled by Wrex, or perhaps simply not curing them at all; ensuring peace on Rannoch, or eliminating the geth, etc). You control if you feel that either humanity should be the dominant race (using the Reaper forces to assert their control) or if you feel that the galaxy will be left too unstable by your choices (the quarians, not the geth, were wiped out on Rannoch, or a cured krogan are led by Wreav, etc) and thus needs protection.
Or something like that. Of course, this would probably need some plot changes, but in simple terms this is how I would've had the endings. No synthesis, just destroy and control.
As for how you make the choice: after you have defeated TIM, Shepard collapses and you either crawl towards Anderson (basically leaving the Crucible to do its thing; you get the scene with Shepard and Anderson together, and the Crucible fires automatically - its sole purpose when built was to destroy the Reapers, so it makes sense it activates automatically) or you crawl towards the control panel than TIM was fiddling with (reaching the panel will make Shepard interefere with the Crucible's firing, instigating the control ending, but if Anderson is alive he will try to dissuade Shepard and ultimately will pick up TIM's dropped gun and try to shoot you - if you wish to instigate the control ending with Anderson alive, you will be forced to shoot him).
Just realised I've gone quite a way from the original question. Yes, I think the ending would've been better without synthesis.
Modifié par Candidate 88766, 06 septembre 2012 - 10:46 .