Currently in ReadyAPI, the asserted values are not displayed. You have to actually open the assertion (double click on the assertion) to view the asserted value(s). This is somewhat cumbersome, as a tester you want to see all assertions and asserted values in the same overview.
Here you can review submitted feature requests and vote up the ones you like! If you can't find the feature you want - go ahead and suggest your own idea. Ideas with the highest rating can be implemented in the product.