UPDATE:
I understand NG+ isn't done yet and that the next update will change the Evelyn romance requirement. Given that, I was still curious what the outcome would be if you tried to be a 'nice guy' and not break any hearts here and find out which characters you had to have sex with to win the game and what would the result be with the other characters if you could or did.
Well I've added romancing Evelyn to the choices I outlined in my spoiler and got the same result, exactly. I was 1 charisma point down as I had chosen to not romance the FQ previously. So that choice appears to be a requirement as well. So, bottom line is, you have to solve ALL secrets and max out ALL requirements including charisma prior to starting the end game or you fail.
Nice guys finish last.