Its been interesting reading this thread. My take is that most want him to succeed and any criticisms have been born out of the disappointment of high expectations and sympathy for Lima himself, knowing that top sportsmen don't fail on purpose and the better they are the more failure hurts.
I think the other problem is that a lot a FBs hard work takes place off camera. We don't see them working hard following the play and trying to get in the right positions, which must be 80% of the FBs job. hat's something that journalists are seeing and we aren't - and that can be said for all the back line and even outside centre.
As Stephen Jones said in that podcast, he's born that failure and disappointment well and fought back with a smile on his face (mostly).
At FB he certainly adds a great deal when he has the ball or pops up in the line and in that respect I can think of a long running England FB who was renowned for never passing, that can be equally frustrating.
I think we can be fairly sure that he is working hard with the coaches to improve himself as a FB, if not for personal pride as a professional then to improve his marketability if and when he does leave. Having listened to him and read about him I think it will be personal pride, he doesn't strike me as being that mercenary.