1) You CAN get heated leather seats in the SR5, from the factory, same as the LE. The option for Nav would be nice though, I agree. Then again if you do that there becomes less and less reasons to jump from an SR5 to a LE.
2) So we buy a extremely capable off-road SUV, modify them a lot, but we are afraid to break a fingernail closing out rear gate door? Seriously, I just don't get peoples desire for that feature. In a minivan or crossover, sure, my wife complains about breaking her nails all the time in the winter on her Escape, but not an issue for me