If it was something they wanted to get people for they could, they have the ability to see this in every case if they want to. Reporting them is just going to show that you are upset about it in that case. Two things they could add: 1) Let you join back in if you were disconnected and not part of a fire team, 2) Make the matchmaking fill the blank spaces on existing strikes more readily with new people (maybe an opt out if some people are going to be upset about it).