I got everything in 6 hours, works fine for me. I didn't notice any issues with knock out list. All people who I played with got everything too. In just 7 hours.
I teamed mostly but ran about 15 rounds solo, maybe more. Up until Monday night my best rounds were solo. I think it does benefit to play in the crucible with a teammate until one is used to the space, after which time there really isn't much of a difference. I don't notice anyway. I also won a great deal of 1v2 encounters this week because of the lack of that second pair flanking. I think that is where the Crucible is rough, even when you are with someone else or a team of 4, when you draw a team that can really run the 2&2 strat, death comes quickly and from the side usually.