Man, there's a lot to read, and a lot of the multi-quotes just bled together, so I'll share my thoughts for whatever pointless purpose it servers to regurgitate what was probably already said:
- Destroy wipes out EDI & The Geth. It's the best way to be "safe", but once again what does that mean? No more AI? Outlaw on AI bans, y'know, like they talk about in Mass Effect Acension, the very thing some new upcoming organic race (Humanity) decided to screw around with because they weren't there for the whole Quarian vs. Geth thing? Eventually, somebody somewhere is going to treat the "Reapers" like some myth/legend and not an actual historical event, and eventually somebody will create an AI that decides to wipe out humanity because it's chaotic, illogical, emotional, etc. Things seem great in the short term, but you're all doomed in the future unless everyone plays by the rules (SPOILERS: NOBODY EVER OBEYS THE RULES!)
- Control forces you to control the Reapers. Nothing in this scenario really prevents the potential devastation AI may eventually have upon Humanity. In fact, Shepard him/herself might have to just rehash the Catalyst's plans and control the Reapers into wiping out the cycle, and just making everything repeat itself down the road. Once again, you've got an inevitable and doomed conclusion.
- Synthesis pretty much merges it all together, makes everyone the "same" on some genetic level. It's a diplomatic solution, a concession to prevent an otherwise hopeless future. It makes sense on some level, and it makes sense the Catalyst, who is cold and calculating and basically some sort of altruistic magic space AI trying to look out for everyone. As for Hybrids making AI, I guess, but the logic here is that the combination is so much better that Hybrids will ALWAYS be smarter than AI. That AI can never look at them as inferior, and thus logically serve their masters and/or work with them peacefully (heck, the Geth basically wanted to do that with Organics to some degree, they just didn't like to be treated as slaves/objects.)
To make any sort of ACTUAL conclusions we need more of an understanding of the Catalyst and WHY it thinks this way and WHY there can't be any other outcomes, we barely have that information available, so... it's hard to judge what the heck is what at this point. Here's hoping the expanded scenes also give us some more context for our final decision, or that a book or a comic or SOMETHING explains this plot device.
Also, from a meta-game perspective, it's obvious the Green choice is the "best"/"good" choice. The game, 90% of the time, allows you to pretty much avoid any sort of "bad" stuff from happening, and will always let you easily puss out from tough decisions, especially with Paragon/Renegade conversation options. Considering you needed all those extra war assets to even unlock the Green ending makes it obvious that it's considered the "easy way out" decision and is supposed to be a positive as opposed to a negative.