Maybe I'm becoming cynical, or something, but anytime I see compromise entering the picture in gaming these days I assume people will be pissed.
The people who want Dragonlance will scream that it's an insult that their setting doesn't get full support, or that they now are forced to have a DDI subscription, or something random about new gamers not having the proper experience.
The people who don't want Dragonlance will scream that it's wasting precious electrons or resources in Dragon and Dungeon that obviously would have been filled with something else they wanted, or that it's just a tactic that moves away from REAL 4e in favor of nostalgia or that it harms new gamers in some way.
I AM feeling cynical today.