I have an easier time believing Locutus will be a bit more limited than most of EXO's other offerings, but the Seven story was that the custom body they had to design and build (or have someone build possibly) was so costly that EXO was going to lose money on every one they sold. That sounds eerily similar to the buzz we're now getting on Locutus (even if it's an easier explanation to swallow with all of the Borg drone intricacies).
So I guess it's just my cynical nature that forces me to wonder if we're not just getting played again. It could just be that Locutus and Seven were more expensive figures to produce, and therefore EXO didn't/doesn't think it can afford to have those figures sitting around in inventory for any amount of time because the profit margin is that much more slim on them. Hence we get the scarcity story pumped out to get people off the fence when they inevitably turn up for immediate purchase.
I could be way off on this, of course, but we got an even more hyped scarcity story out of the company for Seven ("better get her now or the secondary market prices will blow your minds") only to have her return to stock long after the preorder was over, and she remained available and in stock for immediate purchase for nearly a month after all the fireworks died down.
I'm not saying anyone should sleep on this figure in the hopes that he'll "Do a Seven" but having seen what happened in the past, I'm taking the current message on Locutus with a measured grain of salt...