I rembember the reasons why it was introduced (around 2013 time) from what I recall was that you put a limit of 10c because we were having races at -2 to -5 meaning on soft tyres you spent for 6 laps on full push 5/5 waiting to get tyres up to temperature which is very boring obviously.
But those reason don’t apply as much on this new game for 2 reasons,
1= we now have super soft tires which heat up easier.
2= and most importantly you now start tyres from optimum temperature (grey) rather than Dark Blue stone cold tires on old game.
Because of this I’m not sure we need a limit or maybe just a lower limit as all we seem to do lately is 10c races all the time, maybe lowering it will create a bit more variety in temperatures.
Minus -6c is probably too low though and Hards at tracks would 5/5 push all stint if it’s minus degrees so I’d go for just lowering the limit for now and see how it goes.
5c seems a reasonable start