Additional encouragement would be appropriate. The recent trend towards less complicated and better-tested models is good, and should be further encouraged by providing the students with plentiful examples. Better guidelines for model testing would appear to be called for, also in the form of well-documented examples. The role played by SyM Bowl and its associated judging criteria and sample document is not as clear is one might hope. By closing the loop, it has no doubt had an impact.
Most students follow the format suggested in the sample document very closely.
When the criteria endogenous creation of the behavior of interest was added, the number of table-driven models declined. When the emphasis on the clarity of the model diagram was increased, the number of spaghetti diagrams decreased. The students and their teachers are paying attention. The criteria appear to be converging towards a very coherent, if cryptic, set of standards. The sample document on the other hand appears to be woefully inadequate.