Here are my thoughts:
-Why so low on the lifting percentages? I understand it's GPP, but going that light won't accomplish too much. That is of course unless you're basing those %s off of all-time PRs and not your current maxes and the current maxes are considerably lower than the all-time maxes.
-In GPP, I'd consider adding more plyos to overcome inertia like SLJ and a little less elastic endurance bounding.
-I don't really see a problem with it, but I also don't really see an advantage to periodizing ab work based on rep numbers alone. Not all ab work is the same and as such throwing out numbers to follow might not be the best idea. For example, I'd much rather have an athlete do 30 ab-wheel rolls than 500 crunches.