I liked Lacy, thought he made the OL look better at run blocking than they were. In his rookie year he could turn a 1 yard gain into a 3 or 4 yarder. That changed too soon. The weight scrutiny was with him from his first camp, but it was pretty embarrassing when he got around 260 and not well conditioned.
Jennings is a pundit at this point. He can have an opinion. When he played for GB, he trained hard and played well. Sour grapes because his career fizzled out post-GB isn't a good look, but I'm not sure based on the comments posted here that he's saying anything that hasn't been said by posters here.