Did a Refresh and applied all updates... unit did not get hot and the updates went in quickly... no issues restarting. Time will tell if I've fixed the graphics issue but it seems ok for now.A firmware is usually a monolithic chunk of code and the latest version is the *one*.
Not sure about cooler although I'm experiencing an anomaly with Graphics draining the battery during sleep so once that gets resolved I hope to get back to normal. We shall see.
I don't think all updates have the previous updates as well. But if your SP3 is new, then it probably shipped with all updates to that point, applied already.
My guess anyways.
WiFi after hibernate still broken. I still have to toggle airplane mode.