Will there be any drawbacks to your youtube account in the future once you do this procedure?
Just the linking that cannot be undone. If you want to change your channel name, then you must change your Google Plus name. If you change your Google Plus name, then your channel name will change also. If you have already snatched up a custom URL, then you might not care about this.
For example, I have 3 custom URL's that all point to the same channel because of this.
youtube.com/user/dismalbliss
youtube.com/c/RobertAngle
youtube.com/RobertAngle
If I change my channel name, my Google Plus name must also change. But if I change my Google Plus name, do I lose the bottom 2 custom URL's? I have no idea. So, I just keep using my real name because I don't want to confuse or lose subscribers.
Now I could create an additional channel under my main Google Account. This will, in turn, create a Google Plus Business Page for that channel. Then I could just upload to that new channel, and renaming it will not effect my person G+ account. But again, since I already had a decent subscriber base, I chose not to go this route.
Will it affect how you earn money from Adsense account?
No. This will be fine.
- Bob