I also believe No. 20 is a fair place for us to be ranked in the pre-season. Of course, I really won't be happy unless we cut down the nets at the conclusion of next year's NCAA tourney.
I would think #20 is a good number. I do agree that if they learn how to play defense then look out. Offensively this team will be as good or better I would believe. If they all buy in on defense then they could be top #15 team for sure.
Defensive improvement is the key to OU being a better team. OU also has to learn to close out games. WVU, NDSU, Louisiana Tech, and a few others are all games OU could have won by playing better in the final few minutes.