Yes, they did. The fact that while all his personal issues were going on they decided to move him away from the position he'd been best in in FG and tried to play him at half where he wasn't comfortable is further proof of that. They made him play at a weight he wasn't comfortable at, in a position he wasn't comfortable and he lost all his confidence and what had previously made him a good player.
Brisbane are so desperate to get another Lockyer they think they can do the same thing again by taking a promising fullback and trying to turn them into a first grade half. Difference is Lockyer was already established as a player before he made the move. They've taken two young kids that were still developing in the top grade and shoved them into a position their skills simply weren't ready for. The skills required to play half are so much more extensive than anywhere in the outside backs. You can't just shove someone there before they're ready and not expect it to set back their development.