It is not possible to add relationships to a view based on entity reference fields, this is needed to use the referenced entity for fields/filters/sorts.
Will also become useful if we start to generalize this into a generic views data generation for entities, as we will also need it for things like the node -> author base field entity reference.
This is also functionality you currently get with the contrib entityreference module.
Add the necessary views data integration.
User interface changes
Adds new relationship options to the views UI.
PASSED: [[SimpleTest]]: [PHP 5.4 MySQL] 73,320 pass(es). View
FAILED: [[SimpleTest]]: [MySQL] Failed to run tests: @reason. View