DDevil wrote:
Also, I thought only the Synthesis option would destroy the Mass Relays. As far as I remember it, the Catalyst only mentioned the destruction of the Mass Relays when talking about synthesis. So AFAIK in my "destroy the AI" ending the Mass Relays are still there.
Nope, what the Catalyst says is that whatever choice you make the Crucible distributes it using the Mass Relays destroying them in the process. So, to a very large extent all three endings have to be the same. I think a lot of people missed this nuance judging by the whole "three different coloured explosions" complaint.