as long as the match duration is of enough length to enable slower/newer players to compete, or to give slower build up decks enough time to compete, then having the match determined by an actual winner is fine. 75 minutes is borderline for time limit I think. 80-90 would be optimal. a lot of matches end about 60ish, but yet enough go to time that 15 more minutes probably makes enough of a difference that the number of tied matches should drop dramatically. I do not know what the time constraints for the qualifiers are, but I am hoping we get closer to the 90 minute range.