This is a bit odd... I thought for sure it would be a rank 30 cap, not rank 20. The reason being that it was specifically stated in a recent interview Q&A that "all chocobo skills would be available" with this patch. Rank 20 cap implies that only two-thirds will be available :S

Also! My fiancée had a very interesting idea... Why not make something more out of "cleaning the stables" and create some method for turning the waste into composte for the garden?