Hey Arturo, thanks for your comments! Yeah the thing with angularytics is funny enough on the fact that we both wrote it the same day (without knowing it, of course).
About your proposal, you make a good point. I guess I could extract the link function and assign it to both directives in order to allow using a single directive in cases like the one you mention.
So: as long as analytics-event or analytics-on are used (with or without values), event tracking would be enabled.
Sounds good?