Those of you with Low Temp Thermostats

[Vista glass]

I recently installed a low temp thermostat and a new cap , along with a coolant pump ,new belt and new coolant. Thats a lot of variables but I have noticed a slight drop in overall operating temperature.Per the dash gauge maybe 10 degrees. I am in Florida and the ambient temps have been in the 90's before and after this work. In May, based on discussions here I was investigating what was an elevated operating temp. I found a bad radiator fan and replaced it. That helped a lot but the dash gauge was still reading relatively high. Two months later the coolant pump bearings seized and the pulley shaft snapped (is that engineered ?). The vehicles operating temperature is now more in line with readings other members report here. Is it is possible the old coolant system components had simply lost efficiency and their replacement brought the system back to specifications resulting in the "normal" operating temp? I have noticed only a small change in the time it takes to reach let er rip operating parameters. [