That's actually an interesting observation and something I've thought about. This wasn't the only time a resurrection of the dead has happened: don't forget the time when Pein revived the entire leaf village.
It may not be true that Kishimoto is "running out of ideas", but it's more than fair to criticize him for being too generous when it comes to the resurrection of characters.
Think about it: Kakashi, Deidara, Itachi, Hinata (Did she die or was she just injured?); even Minato's psuedo-resurrection: These are all characters that the fans have enjoyed and that really bring flavor, interest, and suspense to the show. Without these characters, I think it's fair to say that Naruto just wouldn't be the same.
Nevertheless, I think the consequence of these resurrections is that the reality of death has been severely diminished. No one is really dying anymore except for expendable ninjas that no one really cares about anyway. Moreover, if someone did die, it would somehow have to be this grand jutsu from a seemingly unstoppable force. It used to be that 1 clay bomb could kill you, if not severely injure you, but not anymore.
The edo tensei provides bountiful opportunities of nostalgia and "heart-wrenching" encounters; not to mention the fact that it's the reason the villages formed a joint-coalition in opposition to Tobi. So it has its pros, but it has its cons as well. It trivializes death and it's an obvious attempt to wring out every last possible drop from the more relevant characters before they're discarded.
