There are, however, two main problems related directly to the size and construction material (resin), namely, price and limited availability. At ~350 USD (+s&h) these model are not easily affordable for average miniature collector. So, they found elegant solution for both issues by moving the model to plastic! From their Kickstarter project description:
"The Leviathan Crusader has made it to the pre-production phase (mold draft and parting line establishment for metal tooling) and is ready to become a plastic injected model kit. Not Resin, not Restic, not some soft plastic hybrid, but injected high impact polystyrene."
"Pledge $89 or more. Ready for Serious Stompin! - An 8 ½ tall plastic model kit of the Leviathan Crusader. That’s ¼ the price of a resin kit and made of injected plastic."
What can I say, at this price it is really exciting offer (IMO), and even with international shipping cost, it's still something I may consider to buy.
Moreover, they are going to produce plastic version of their Stormtroopers. At the moment they got much less supporters than Leviathan, but in a long run they may establish a base for a larger range of miniatures based on some original fluff/universe.
At the moment, this campaign got more than 120% of the initially requested funding and still has 20 days to go! So the plastic titans are reality now. I looking for GW/Forge World response to this challenge (and not by issuing more lawsuits against independent companies).