This has been discussed many times before, and you aren't going to change anyone's mind =)
Some people like it defaulting to be character, some people don't. No matter which way you go, someone won't like it. You just happen to be one of the people that doesn't like how AceDB-3.0 is setup by default. If the copy/change profile is not working, then that is something you need to let the author of the mod know about.