Come off it guys, you're way too harsh.
In defense - His biggest issue is that he seems unsure of himself unless he's the first one in... He had Bird running at him all night and he handled it reasonably well for a small guy. One on one he usually comes up with the goods (unless he's sliding or scrambling, then he always seems to get caught out) - it's when he should be coming in as a second or third tackler that he just hangs off, then gets caught flat footed if the ball carrier gets an offload away or breaks the tackle.
In attack - He seemed to play more of a genuine first receiver role last night, sending Benji out wide more often than I've seen in awhile. I imagine this is what Benji's been wanting from him, and why he's talking up his confidence in the press. Clearly he's got some work to do, but I think the issue is he's running around with stars in his eyes. It's not a lack of ability. As soon as he, Farah and Marshall sort out their combinations properly, he'll be right. This is as much a problem with Marshall and Farah as it is with Lui - they need to better accommodate him. It is also an issue with the coach, who should be developing more set plays to get him into the game and out of his shell in a controlled way.
Will this happen before the Grand Final? Well, let's hope so... If he gets that far, you'd have to hope he'll start believing in himself a little more.