I still think you are wrong that a player like this bets .50 and only calls the flop with AA and KK. Personal opinion/recent experience at this stake to me makes me put AA and KK in his range based on flop play as far less likely than you do. I actually can't remember seeing a player as described in OP ever do anything besides mash pot on these sorts of flops with over pairs.

Regardless, opinion differences and such.