I think DC is working on it
...hopefully they will crack it in the next six months!
Yes, I believe they are. But again, they very likely wont decode the whole thing. There is also a lot that cannot be done unless DC has the car in front of them- and that is where end-user tuning comes in, which will more than likely never see the light of day... unless the VC is used in the Gen-5. Regardless, there are about a million reasons to go with aftermarket controllers, up to and including the laundry list of things they can do that the VC CANNOT do.
The Gen-4 finds itself in an odd place. the mid-tier builds of 1000hp or so would require a full engine re-work anyway, thus bumping the price, and making it easier to swallow the ECU cost. However, the lower tier builds require less work than other generations, but dont have the tuning capability... yet. This is likely where the ECU tuning will pick up the slack on a simple level, much like the SCT does for the Gen-2/3's. The only problem is that without end-user tuning, it wont be nearly as widespread as the SCT is. The result is still a "gap" that most will fall into, as the VC tuning would be limited, and the Pectel/Motec options remain very pricey.