blue cats increase in lake keystone

over the year blues have had a set roaming in keystone lake in oklahoma. winter they had hit the channels and streams and in summer they stayed in the deep lake areas and in holes. this year has been the exact opposite. and things are getting weird. small cats are gone. an influx of rec fisherman have caught 5-15lbs and kept or killed them. now big blues (25+) are being caught in areas they have never been found. our lake house in the last 2 weeks has netted 5 20 - 36lbs off the dock in shallow 16 ft deep water. does anyone have any idea whats going on. the channel cats and flatheads have all but disappeared and were now releasing almost everthing weve caught with the exception of a few small easy fillets and 2 bigger fish