One of the things I most enjoyed about the Phase 1 MCU films were the end-of-credits teasers. From The Incredible Hulk through Captain America: The First Avenger, they made it clear that the MCU was headed in a definite direction, that the disparate events of these films were building towards The Avengers. Even Iron Man hinted that there was more to come than that one film, or even that one film franchise. I found that this injected a heightened sense of excitement into the whole line.
Since CA:TFA, it's felt to me like that sense of cohesive direction has been missing. CA:TWS gave us an A:AoU tease, but it's more or less stood alone. Both The Avengers and T:TDW did a prologue for Guardians of the Galaxy, but (IMO) that's felt more like a dead-end for the MCU as a unified saga. Naturally, with Marvel/Disney raking in $Billions off these franchises, I don't suggest that the MCU's about to end. I also grant that GotG represents a diversification of the MCU, as do the Netflix projects (not a bad thing).
All that said, I'm left with two questions:
1) Did Marvel Studios deliberately abandon this very interesting promotional tactic?
2) If the answer to #1 is "no", does this indicate that Marvel Studios' is losing it's ability to coordinate its various projects?