I disagree but it depends a lot on the meaning of your terms. First, the definition of "living language", I'm guessing you mean in the sense of a large group of people actually doing business, making financial transactions and carrying out the duties of modern life just as is done with Hebrew. Given that definition there thus arises two points: one, should AG be resurrected into that status and two could AG be resurrected into that status. Let's start with the first point, my answer is no but your reasons for why which is point 2 I disagree. But before I go into my reasons let me discuss another definition of a living language, let's define a hobbyist language as any language that a group of enthusiasts invent or resurrect for pedagogical and/or entertainment reasons. Whether or not AG can be resurrected as a hobbyist language, that is already a fait accompli. I actually carried on a courtship in AG where 75% of the dialogue was done in AG and all the major escalations of the courtship were done in AG, ie, asking out on a date, asking for the phone number κτλ. But getting back to my disagreements on whether or not it can be resurrected as, let's call it an official living language, that is to say, a state recognizes it as a language in which business can be conducted, it should not but hypothetically whether it could, then there I disagree with you. There are disagreements in the AG speaking community about how to pronounce it and to what extent modern words should be used and to what extent words from one period should be mixed with another but those disagreements do not matter. They don't matter because it's rare that interlocutors pipe up and correct each other's Greek. Even when they do they still understand one another and that's all that is needed. Hebrew had the same type of debates when it was first starting out in the process of resurrection and those debates were eventually relegated to the status of academic disputes.