They're adding a nice feature into the game that a lot of players are already responding positively to. Don't knock them for adding fun little treats. These types of gameplay details are just as valuable to add color in an MMO as the big picture fixes, and something this small isn't exactly detracting from development labor in any significant way.

As far as having NPC descriptions above or below the name, I may be wrong but I believe that Yoshi mentioned he wanted to add this feature to the 2.0 client.