The reason your jeep takes so long to warm up might simply be as simple as the thermostat sticking. No bull. happened to me about this time last year and took nearly 12 minutes to correct. first make sure the coolant level is correct. As low coolant level can be other problems that need not be dealt with as long as this fixes the problem. Replace the thermostat and gasket and top off fluids and make sure you recheck the fluid level repeatedly after a couplr of trips to insure all the air is removed from the system. The thermostat can be checked for proper operation with a boiling pot of water and a thermometer or infrared temp gun but the are inexpensive to replace so if you are already in there then time to replace it. Had the exact same problem as you took 30 minutes to be luke warm and after replacing the thermostat it now is toasty in 4 miutes of driving time sometime less.
Also if for some reason you installed a 180 degree or 160 degree thermostat for perfomance reason (IE cold air box and chip) then recomend putting the stock 195 degree thermostat back in for winter.
As for the seats not getting hot? if the bulletin does not correct the issue (given by someone else) then the problem is almost definetly in the lower elements only. the back elements (seat) rarely fail
check for voltage (power) to the circuits when the switch is activated to verify that there is not a fault in the switch or wiring.