You mean the authors of the setting? The 5th Age stuff all comes about as a direct result of the Dragons of Summer Flame book. Still have no idea why they tried switching to the SAGA card system, but not all experiments work. They probably were trying to accomplish something that did less to take the player out of the story, remember that Vampire and the rest of the Storyteller system from White Wolf was trouncing D&D at that point.
While "Dragons of Summer Flame" was a mistake too, the 5th Age designers went above and beyond it. DoSF removed the gods and WoHS from the setting, because there was basically plans to wrap the setting up and discontinue it. So without gods and magic, you basically had no more stories to tell.
Someone else then decided they wanted to turn around and use Dragonlance as the setting for the new SAGA game. The 5th Age designers decided to keep DoSF as canon and then move the setting forward. To move it forward they turned 3/4 of the map into desolate wastelands ruled by omnipotent dragon overlords of colossal size which were never to be directly challenged. The design goal was that players of the setting were to live beneath their unstoppable tyranny and fight the small battles. This is why the 4e FR reboot reminds Dragonlance fans of the 5th Age.
FR fans got an better deal out of their setting nuking though. While Akanul replaced Chessenta and Returned Abeir replaced Maztica with viable adventuring locations for all levels, the desolated realms of the dragon overlords was... desolation.
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