+/- Support on this
If we are going off by lore, then for 682 there would have to be an instant nuke as soon as he breaches, there would be a lot more 939's, 035 could mind-control people that are around his chamber etc. etc. I get the point you are trying to get across for it to involve more skill in 106's RC-ing process but if you make it so that only D - class can be used for his recontainment, he can just go around LCZ and steal every single D class that MTF try to bring over. You could argue that 2 MTF can just grab 2 different D class and go to the 2 different ways into HCZ but if 106 has even the smallest amount of skill, he will be able to catch up to the other and take them.
I do agree however that the fact that his recontainment is based on an RNG dice roll the first time, it doesn't make that much sense and he should be able to be RC'ed as soon as someone is femured since pain is the main factor that causes the thirst of 106 and he would definitely not ignore it.
Opinion might change.