The way I see it, is that this was CoinCheck's fault and they want NEM to do a softfork to save their asses. If you are the owner of an exchange, you should have your private keys secured in a hardware wallet, cold storage or whatever, not in a word document in your laptop.  NEM's blockchain works flawlesly and that's why I agree that they shouldn't do a softfork, If something works good, don't touch it. They are helping them with that "Tag system" wich is a good idea, but making a fork?? really??