There's a lot to like about Assassin's Creed, but the series also has a host of long-running annoyances, chief among them the infuriating way you've had to "tail" people from the shadows. So thank the heads of various religious faiths and beliefs that the way you do this is changing for the upcoming Assassin's Creed: Unity.
This IGN video says that the frustrating tail sequences and instant failstates which accompany them and that have plagued the series, especially in the last two games, are being modified. The ways they're being changed are a little vague - there's mention of alternate means of getting the same information - but I don't care what it is so long as I never have to enter another "magical glowing realm of whispers" ever again.
Assassin's Creed Unity Hand's On Demo - E3 2014 [IGN]