If we had a 'full-strengh' back-line right now, Lui might find himself taking a few weeks off to find some form in defence... But we just don't have the luxury at the moment.
Fact is, it's convenient to have Moltzen in the centres right now... It gets him back into the rhythm of playing a full 80, without having to do too much of the high-end defensive work or be all things to all people in attack. No, he's not a specialist and it shows, but it's a better spot to have him than fullback, halfback, five-eighth, or hooker while he gets back up to speed.
Let's not forget that up until about a month ago, the last time both Lui and Moltzen were available for selection (ie both capable of playing 80 minutes of first grade football), and Moltzen was not needed elsewhere in the backline, was early in 2010.
The team is holding its own in spite of Lui's defensive liabilities and our reliance on second string outside backs, and Moltzen is recovering his desire and his confidence. If we are still in contention come September, we would hope that either one or both of these gentlemen will be fit and available to play half-back. We're in pretty good shape as long as we have these two in the mix. Why complain?