Whoa, 200k lines is a lot. Without knowing the details I wouldn't want to pass judgment, but that would be a flag to say the least. I don't know how he is reading all that code before pushing...

There's a danger in it too because (whether it should or not) CTO title carries a level of weight that might result in less scrutiny than an IC (which it should not IMHO). I hope he is encouraging objective reviews and not pushing stuff through on his title.