I left it because I had a copyright strike that wasn't going to go away soon, so I made the other channel and started posting content there.Goo advice mate, and congratulations on your success. The only thing I do not understand is why you had to create new channel ? You could just re-brand it and subs who did not like your new topics would just leave.
Anyhow keep on making quality vidoes and will back at 20k subs in not time