1. i find myself questioning why is the illusive man here and not dead?
2. how did anderson get ahead of me?
3. why is this star brat trying to push me away from destroy?
4. how is control a better option than destroy? (not like your controlling all synthetics just the reapers)
5. if synthesis is such a glorious choice why doesnt he just have reapers take a dead human body and throw it in the beam?
6. how does the destroy/synthesis/control beam hurt the normandy? (not like its a beam of ultra mega space death magic)
7. how the hell does the normandy crew fix its engines while it was crashed on some foreign planet?
8. is shepard on earth or on the citadel in breath scene?
9. and finally, does he ever reunite with his LI? (if you chose destroy with over 3100 EMS)
10. oh and i forgot to add if there are geth in the EC destruction ending then how is it that they survived wen starchild stated that all synthetics would die?
Most of your questions are answered in the game, some have to be speculated on, but anyway, here goes:
1. Why should he be dead? He fled to the Citadel when we assaulted Cronos Station, this is said by Vendetta.
2. This is speculation only, but people here assume that the part where the walls realign themselves actually rotates or something along the lines, so that could mean Anderson would come out at a different point, and since he's not passed out like Shepard for some time, he can get ahead.
3. Because if you destroy it and the Reapers, the synthetics threat will become an issue and they'll wipe out organics at some point (according to its logic/programming done by Leviathan).
4. It's a status quo, and Shepard as the new Catalyst can intervene with the Reapers should the synthetics problem arise.
5. This is a bit of a spiritual one, I think. It tells Shepard that he/she is ready, and I reckon it takes someone alive with the will and desire to actually join organics and synthetics. It doesn't work with just any dead dude. At least that's what I took away from the dialogue.
6. Destroy could affect and target the Reaper tech, but I think for the rest it just... crash lands. Don't know though, been a long time since I watched both Synthesis and Control ending scenes.
7. Same way Cortez is being able to fix the shuttle whenever there's a problem? (Most notably during Leviathan DLC)
8. Citadel, confirmed by a dev via Twitter.
9. Of course, if you want that
My Shepards all do if they live. The power of headcanoning!
10. You had geth in the slides when you picked Destroy? They are gone with this ending.