For a semi-final, when we know demand isn't going to be sky high, I don't see the issue with offering criteria like:
Weds 9th: All SC holders can buy
Thurs 10th: All members can buy
Friday 11th: Open sale + SC holders/members can buy +4 additional tickets.
Here we are on Weds 16th and some supporters still can't buy tickets. I'm speaking to a friend in Greece. Him and his Dad want to come and watch the game, they've been to 2 games at the Etihad previously, but do not currently have a membership. They cannot buy their tickets yet and it now means they've had nearly a week where they didn't want to book flights/hotels just in case.
It's madness.