A whole bunch of new buttons and usability improvements are done by the Usability initiative. You can install Extension:UsabilityInitiative to get them. Until they are stable enough, they won't be part of the MediaWiki core.
We probably don't want all of Wikipedia's edit buttons by default. If you want them on the wiki, it's easy to set them up, but the default should contain as little UI clutter as possible.

thor.malmjursson wrote:

There's a clear difference between UI clutter, and giving users where a wiki isn't running the usability interface a more comprehensive set of buttons to help them learn the wikicode.

Since they see in the editbox, the code generated by the button, they won't need to use them for long, but learning the functions in raw code is a benefit, which the extra buttons would help with, and the amount of work required as I was told by Tim, would be minimal.

Please reconsider the 'wontfix', it should be at least a 'we'll look into it' if nothing else :)