Reverse sensor, floor mat and solar film are stardard items given, unless you want to upgrade them.
Visor should be very cheap as TC install OEM type. last heard was about $40?
Rust protection is up to individual, I prefer to have it and asked that for free.
paint protection - according to my SE, one time can liao, and as long as u wash and wax your car regularly, should be ok, or else u need to send back every 6 mths to maintain it, i think up to individual too.
As premium came with a number of additional items compare to basic, so I don't think there is much you need to change, at least for me (I will collecting my car next week)