WordPress why-can't-Is

WordPress, why can't I:

• search for authors in the admin section
  
• search for keywords in post content in the admin section
  
• search for practically anything with any success in the admin section
  
• sort the post view by clicking on column headers
• go from the Edit Post page back to the Drafts list (or Published list, or whatever) in a single click
• have you remove empty tags autofreakingmatically (empty tags for the love of God!)
• unschedule a post and save it as a draft in the Quick Edit screen
• find commenters by searching for their names in the comment admin view?

Hmm, fucker? Usability, people! Usability!