Just follow your SOP. Do not forget that a lot of other experienced people, manufacturer and rule makers did write these damn rules.
The book says at least 1 AP for CAT II ( unless you have runway in sight at that point or you have to perform a go around) . There are for sure reasons for this. Do you think that manufacturers or operators want to divert ? They would have written continue manually and land if you have necessary visual cues at DH. One of the reasons is you can not fly the damn thing like the AP.
Regarding FLARE . You can land but most probably it will be hard landing. Try it even in CAVOK weather to disconnet AP at 50RA and you will realize it is very difficult adn consider this in real CATIII visibility ?