Creating a responsive layout that works across the board is not easy, I know this all too well as I'm in the process of revamping some of my clients' sites and my own. That being said, I make sure each site works as close to perfect as is humanly possible in both mobile devices and desktops before I flip it over. When designing a site like this the needs of the users really are the most important aspect of any redesign. I'm all for change, I'm all for using the latest techniques that actually work. Design fads come and go and I avoid them like the plague.
But I think it is fair to say that no one on this site is going to be creating 3d renders using their mobile phones. Sure, they might glance at new stuff while at work, but a lot of your users are going to be using laptops and desktops when it comes to downloading and buying. I think the new design has a lot of potential but clearly there are issues that need to be ironed out. Hopefully, this will get done sooner rather than later.

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My store here at Renderosity.

Art By Mel