The very reasons you`ve given why you dislike this ship are the very same reasons why I love it. There, I`ve said it, I love this ship!
Also, I beg to differ on that point. The ship really is designed as a Steampunk creation, even though the Lego Movie really didn`t touch on that concept. I`m a huge fan of that concept, and even though I`ve seen the Lego Movie already, my interest was peaked when the very first image showed up online a month ago. My opinion would be that those who are not familiar with the Steampunk concept but saw the ship in the movie may be attracted to the very different/wacky style of build that this is. Steampunk is not everyones cup of tea, and when compared to other concepts, I`d say it is much more of a smaller niche. You either like it or you don`t. While it would make sense, as others have said, to be "on the fence" about that point, I`d still say it`s either a concept you like, or prefer something else. So no, I don`t think all of the popularity is resting on the Lego Movie. That goes for AFOLs. Absolutely it will drive sales to those who are not familiar, but it`s very much a unique ship and the price point will likely prevent it from becoming a huge hit. That doesn`t mean it`s not a good ship, I seriously love it, it`s most of what I`d want in a Lego Steampunk ship, and in some ways, more so. That`s me personally, but of course everyone has their own taste. Clearly you are not a Steampunk enthusiast, and I respect that, but to say that it is "just a stupid combination of bricks and colours" would not be a true statement to someone who is a fan, like myself. I don`t think the designers could have done much better with this, I`ll be buying one most likely during double VIP, because even though I love the ship, money still needs to be maximized.
As far as investing goes, that I would agree with being on the fence about. If everyone was a Steampunk fan and enjoyed it, then I`d say it would be a shoe in as a large investment. Sadly, not very many are, and most kids, if not all, don`t even know what the concept is. That`s going to hurt demand. We`ll have to see what the market and popularity for this set is a year from now to better gage the ship for investment.