i have alreay 2 situations where directives and services/factories didnt play well.
the scenario is that i have (had) a directive that has dependency injection of a service, and from the directive i ask the service to make an ajax call (with $http).
in the end, in both cases the ng-Repeat did not file at all, even when i gave the array an initial value.
i even tried to make a directive with a controller and an isolated-scope
only when i moved everything to a controller and it worked like magic.
example about this here Initialising jQuery plugin (RoyalSlider) in Angular JS