I'm a big fan of moving forward. I'm a huge fan of the 3.0 function, and for Star Wars. The 3.0 Play Sets are great, and their unlockables for the 3.0 Toy Box are great.
But the PC side of Infinity is not quite the same as the console side. If you have an Xbox 360 or a PS3, you can run 3.0. And if you want to play the Avengers, Spider-Man, or Guardians Play Sets, you can purchase a 2.0 Starter Pack for them (same goes for the extension games). There is a significant hardware requirement bump moving from 2.0 to 3.0 (esp. on the graphics card side). You can have a laptop where the 2.0 Toy Box flies, yet the 3.0 Toy Box won't run at all. And it may very well be a shift in graphics libraries, etc. that make it problematic for 3.0 to ever run on those older laptops.
So what about re-instating the 2.0 download? Perhaps even the Play Sets? The code base is already there. There's already been a price drop in the virtual power discs & character bundles, many of which tailored to the 2.0 version. Folks could download the 3.0 Toy Box for free, try it out, and if it doesn't fly, they still have the option to download the 2.0 version and make online purchases for that.
There is a market for lower-end PCs to run Infinity. There is a market for the 2.0 Play Sets & 2.0 Expansion Games on the PC. And there are two sides to it - there are "Power PC gamers" that would enjoy the larger set of Disney Infinity gaming options, and there are the entry-level gamers that start on the PC due to cost, who then jump to a console version (and yes, I do believe many "Toy Box Club" members fall into this latter category). Libraries, schools, etc. typically have slow upgrade rotations on hardware, and graphics cards are rarely a consideration in their purchasing decisions.