I'm with you. I have the occasional 4th gear lockout on stock. Did the AC Delco swap recently at 24k and the shifts seem about the same. Haven't had any 4th lockouts yet though.
Had them and they are fine in wet road conditions as long as you drive safely.
Biggest complaint is that they are LOUD once they start to wear. They drown out even my HKS Legamax exhaust sound. lol