Please Don't Match Someone Partway Through An Activity On Their First Time
My first time in the Strike in the PC Beta, I was matched in right at the end. While I've played it before, I can only imagine how disheartening that would be to a player who is playing it for the first time. They're missing so much.
Edit: To be clear, I mean just the first time. So, having some kind of permission in place so that players only can be matched in progress after finishing the Strike for their first time.
...really? It's not a Raid or a part of a story mission. It's a strike. Play it again. It's not like you're going to be missing anything incredibly important. There's more important things to worry about anyway.