As I've stated repeatedly, I fully expect that those who have had Moderate Consequences inflicted upon them in Round 1 to withdraw from Round 2 for the most part. This is a combat event and while the candidates are expected to have restraint with regards to inflicting injuries, the risk of severe, crippling injuries does exists. People with pre-existing Moderate Consequences would greatly increase that risk by trying to go into a second round with them, for little to no gain - how many ninja would risk a career ending injury just to participate in another round of an exam? Hell, how many of their jonin sensei would let them even if they were so inclined? The injury that Noburi is inflicting is actually quite nasty, as it pretty much fucks up their ability to do any kind of physical combat, with even throwing kunai being affected due to how they would have to balance. But most importantly, it hinders their ability to dodge attacks. Frankly, any sensible person would drop out if they had that injury and their word half was taken.
If it happens, then it happens, but I just don't find it very likely. And as was just mentioned, they can serve as chakra batteries if nothing else.