Add configuration options for Views block under Structure > Blocks > configure
To "add fields to the block configure pages for these two blocks" (as in your question), you should look at the Bean module as a possible alternative to answer this question. Here is a quote about its project page:


  Think of a Bean as a method to provide new types (compared to node this would be a content type) which then provides an add content interface to create as many blocks as you require (see screenshot below). The bean content can then be placed around the site just like any other block.


The video tutorial Drupal Bean module tutorial - using Bean Admin UI provides a great introduction to really understand the power of this module, and the kind of things you can do with it (by only using site building techniques, no custom coding involved). It also shows how the Bean module transforms Drupal blocks into fieldable entities.

PS: this is a D7 module, integrated in core in D8 ...