There were plenty of rules, its more a question of how they were followed, and if the judges were aware of and qualified enough to "enforce" the rules. From the Qualifying Round Rules PDF (idk maybe all rules were thrown out for the finals, however)
http://www.spritestepoff.com/rules
Each Team’s performance is scored on the Sprite Step Off 100 point scale which is divided into four (4) different criteria:
Creativity - Performing new and innovative steps and utilizing a creative introduction and exit (23 points)
Show Theme - The overall storyline of the performance (23 points)
Execution - Carrying out precise rhythmic syncopation of beats (31 points)
Showmanship - Overall manner of Team’s performance (23 points)
Based on this section alone, ZTA should have received a very low score for creativity, and unless the AKA chapter received HEAVY deductions across the board, loosing all or almost all of the creativity points wouldn't have allowed ZTA to win.
Plenty of BGLOers on her have commented on how un-innovative the theme, costumes, and steps were. The problem lies with the fact that the judges probably didn't know that because they were not qualified enough to assess that.
I think the ZTA women put on an excellent and entertaining performance, but I don't think the rules and judging criteria were followed. Is that their fault, no, but that doesn't mean it didn't happen either.