30 million is a real stretch. Look at where those sales are coming from, and compare the Vita to its closest competitor.
The 3DS launched almost a full year (about 10 months) before the Vita. It has sold 14 million in NA and 12.5 million in Europe. Optimistically, maybe we could have hoped for the Vita to have reached 10 million in each of those territories by now, but without giving it a GTA (the best-selling game on PSP in both NA & Europe), I'm not too confident your revised lineup would have done the trick.
You did nothing for Japan aside from Gran Turismo. Maybe it would be up to 5 million instead of the 3.25 million it's at now. That pushes it up to 25 million, leaving the ROW to pick up the slack.
You also didn't address any of the non-software-related barriers to the Vita's success, like its $250/$300 launch price, and its unreasonably expensive memory cards and lack of internal memory.
You can only change so much about a machine before it becomes something completely different, and that's the real solution here -- the Vita's first 2 years could have looked much better if it wasn't the Vita at all.
