On talent evaluation, from my vantage point it includes being teachable. It includes some inner fire/desire to get better as a person and wrestler. They must be a good cultural fit. A good cultural fit is living the life of a wrestler - commitment to the sport in all areas. Carter's X account has nothing to do with culture in this definition. Kids are allowed to be themselves within reason.
On development, two things are apparent. One, each wrestler develops according to their comfort level. If you are a thrower and big move guy (Q and Nickal), he will help you be the best at it within risk management. If you are a grinder/tactician, he will help you become the best grinder/tactician while expanding you offensively. Two, everyone is expected to become a good situational wrestler/scrambler. Better to see a position in practice than in a match. Everyone is expected to master the cross body ride. Watch a PSU meet. They all ride the same way.