This is something I have thought quite often lately, but I don't think that hiding or removing options is the solution. Steem is a complex system, and we should try to make it easier to use without removing the available options.
Using the new rewards is still much easier for the user than adding @null or @steem.dao manually to the post beneficiaries.
Maybe in the future, the team could consider splitting the different features/options in a "basic" and "advanced" UI?
I do agree with the points both you and @mys brought up.