Yeah, the draft sets go 2-1-2-1, so in that regard, collecting Set 2 card-for-card through drafting is half as slow as it used to be although the set itself is half the size so it should even out. Or I would say that if any of the reward chests gave Set 2 packs right now. That's the change that actually stings, in a 7 win draft, you will have received 5 Set 1 packs and two Set 2 packs of cards.I have not played draft in months, because I am not sure I understand how it works now.
If I remember right, after the second set was introduced, one draft out of two is with the first set, and one draf out of two is with the second set, so players who have 100% of the first set and 0% of the second set are completely owned. Is that right?
Rewards are nice though. It looks like I am really experienced with the blue color. I don't understand how my level with purple is so high, yet my experience is so low.
So the most efficient way to collect Set 2 is to play in Events whenever they show up or spend your gold on packs.