I thought it was Peter Jackson. He was given carte blanche by New Line after the success of the LOTR. And a lot of the filler was from Tolkien's other works (not completely fabricated)
Whatever the cause, it was not done well. Not enough material for 3 movies, or probably even 2.
Yeah, I definitely agree. Three was definitely too many, two would've been alright. Sort of ironic how they take one book and blow it up into three long movies, then in the case of Justice League they try to condense 2, maybe 3 movies worth of material into a 2 hour time slot with predictable results.
I left Five Armies convinced the title should have been Battle of the Five Render Farms. A friend disagreed; she preferred Orcs On Ice.
Had similar thoughts about the CGI, but Orcs on Ice just sounds right.