With the limited info we have, I'd vote for collection missions first!
I don't have much gaming time at all unfortunately, which is why I like PT so much. Just log on once a day, hopefully crack a few packs open and even more hopefully - adjust the lineup.
Tournaments, as I'm currently imagining them in my head (most likely incorrectly, but still) will only really be a feature for the players that have the spare time, whereas collection missions is a lot more accessible regardless of how much spare time we have.
