Hot but Stable - Clutching at Straws

205-215 is not too hot. It is fine as long as you are running coolant. Don't worry about it. BTW - the purpose of the thermostat is to make sure your engine reaches proper operating temperature. Changing from a 160 to 195 will never lower your upper end temp, it will just make sure that you lower temperature does not drop below that point. Cooler temps increase engine wear and tear.