Probably doesn't matter if the team with the #1 pick doesn't need a QB, they will still draft luck and trade him to the highest bidder. The bidding will probably start with all of someone's 2012 draft picks, and works its way up to several years' 1st round picks. That could all change if any question marks pop up with Luck this year.
So yea, the 1st overall pick next year will probably be of tremendous value whether we go for luck or not. Would instantly push us to a top franchise either way. I think we'd be foolish to not try to suck for luck if we lose any more games.