I'll answer a few of these.
The heat coming from the engine onto your leg is normal. It was probably your right leg? I noticed this heat when I ride my wife's R3, definitely hotter than my own motorcycle.
The hard/slow start on hot days seems to be an unfortunate characteristic of this bike.
There is one thread dedicated to it
IMO, 95 octane is complete overkill and unnecessary, especially for your 150cc honda. Waste of money, and the only benefit it is doing is appeasing your own mind. Unless octane ratings are different in the PI, but guessing not. 89 octane is going in my wife's R3, just use what the manual tells you to use, and if I recall correctly they recommend 87 minimum. If you need 91 or higher, the manual will specifically ask you to put premium, but that is not the case for your R3. Is your bike still new/low miles? That engine burning smell is completely normal for the first few hundred miles and will smell like that regardless of what fuel you put in it.