I used Victory Way simply because, even at park closing times, I have never seen traffic, so it would likely need minimal enhancements to handle the increase in traffic. The biggest issue with my mockup would be the "off-ramp" for the Studios entrance on the north-bound side, which would be a two-lane ramp. I do not know if there is truly enough room to do that, but that would certainly be a better traffic solution than a backed up stoplight. I don't think AoA will cause too much of a traffic increase on Victory Way, plus there is plenty of room to expand the road through there for an extra lane on each side if it would be needed to handle the traffic. Extending the current south entrance to the top of the lot is certainly a possibility, but it would still be a useless entrance unless you find a way to have traffic from south-bound World Drive and both sides of Osceola Parkway access it as well. Clearly the north "side entrance" just cannot handle the amount of traffic it gets, but it gets that much because it is the only convenient access unless you happen to be coming from 192 or I-4 north-bound, off property from an area where honestly, very little traffic comes from (in my experience).
The only existing issue would be figuring out how to re-route traffic on New Years Eve, as that is currently the outlet for EPCOT cast, and any guests coming from the east end of property and Buena Vista Drive.