This is exactly why the thread is closed now, for your protection against people stealing your creations/ideas. I hope you understand now why it was needed for me to temporarily hide the thread.
Also, there is no way that on NB anyone is gonna steal another person's jutsus. I will copy the whole thread and club and keep it safe and hidden somewhere. So if you see anyone trying things, you just notify me, i go and check the copied thread and take action if needed
~On topic
My opinion is that if anyone wants to start over he should be allowed to do so; People who don't want to change their jutsus, they won't be forced to do it of course. But if someone wants to change he has the right to change.
Now, that combined with what i said above (me keeping backups of your things) is, i think, safe for everyone.