PBI Gold is the best gear we have ever had, yes it can be hot to wear on occasions. if this is the case at every oppurtunity take off the jacket or at least open it up.
It should also be a size bigger than what you would normally think to wear, this allows for air flow. help with heat build up.
PBI also has a limited vapour barrier, Nomex does not. some HAZMAT protection.
As to wearing it, it ain't that hard, use the thumb loops, keeps the sleeves down, ensure the neck nap is up and velco attached. if you got the right size then the legs shouldn't be a problem.
if you get too hot in a structure fire, maybe you have added too much water (steam logged your gear) or is the fire beyond internal attack.