CiviContibute View Customization
What you're asking for isn't possible without coding, unfortunately.  It's a major focus of CiviCRM 5.0 to be able to have user-definable forms in this way.

If you're a coder, or you can hire/borrow one, you can use hook_civicrm_searchColumns to change which fields show on the Contributions tab.  There's an example in this blog post.  Finally, I just uploaded an extension I wrote to Github, which replaces the Premium column on the contributions tab with info on soft credits: https://github.com/PalanteJon/coop.palantetech.showsoftcreditsinsummary