Advanced metrics show us that Franchy was -4 Defensive Runs Saved at 1B in 360 innings (about 40 full games). That's really terrible. -28 UZR/150.
As for Duran, he was -9 Defensive Runs Saved in CF in 408 innings. Again, that's really bad. Some people were saying "oh, his speed will make up for his lack of instincts," but analytics can support our conclusion that his defense was a nightmare. He was worse in CF than Franchy was at 1B, almost twice as bad.