
I'm glad I lost the first 5 straight games on my second visit, not my first, or I might get dispirited. In post mortem, I think my deck was average-ish: not terrible, but not great.
(i) A bit worse than my first-round opponent's (and she won with a consistently slightly better deck, and probably consistently slightly better play skill)
(ii) Probably slightly better than my second round opponenet (but I was unlucky, both games he played on the second turn a card which was really problematic to my deck, and I had to mulligan my opening hand twice in the second game, despite my deck having a fairly consistent set of cards)
(iii) And about the same as my third round opponents': his had slightly better cards on average but couldn't play them quite as consistently. I definitely made several small mistakes throughout all matches, but nothing catastrophic. The biggest thing is to develop a habit of mentally checking at the end of each turn if there's anything to do before the turn ends, and not to lose "may do X" triggers. I lost the first game (the fifth in a row), won the second, and won the third by the slimmest of margins: I was ahead, he caught up with an unkillable, unblockable creature that was going to kill me next turn, we were out of time and playing the last couple of turns allowed, I froze for five minutes thinking through all the options and finally figured out that he'd kill me next turn, but he only had one blocker, and Act of Treason took control of it for one turn, I put on the sword I had in play, and it was just enough to kill him.