The parts most expected to fail are easy to remove, and they even have separate modules for each port. Also, is the TouchID button not paired to the motherboard (so why would one want it to be easier to access than the motherboard in a repair scenario)? The only valid criticism he had was their choice not to use a removable flash module like in their other recent models.
Provisional score 5/10: not too bad physically, although certain parts require removing other parts to access them. The real problem is parts pairing / software locks: you can't use third-party parts, nor even genuine apple original parts salvaged from another device.