I do think they need to be disabled by default - in effect have the IDE start out as "simplified", and as a user's skillset broadens, they can turn on those options as needed in the preferences (or via the config file if you wanted).
I can remember the arguments for digitalRead and digitalWrite The number of posts on the forum where newbies try to use digitalRead like digitalWrite (with 2 arguments) indicates that the newbies are the ones that need code completion, balloon help, etc.
I think that if these features were included, they should be on by default, and easy to turn off.
Newbies have enough trouble learning that making them hunt for things that make life easier seems counter-productive.