Changing the lights so there’s a clear 10 mins for everyone to pour out of car park C would solve so many problem.In the short term I suspect a lot of the work will be to tidy the place up. Despite the work Frasers did there's still plenty of the ground that looks a fucking mess. It needs a good clean and a lick of paint.
The cladding needs the whole lot doing like they did that one section.
In terms of developing the ground itself I suspect there's a limit to what can be done. We can look at moving the camera's to the other side, especially if no solution can be found to not being able to sell all the seats in the balcony.
I would look to make the gate from car park C to Jimmy Hill Way a proper junction, that wouldn't take much work. You could then close the road behind the east stand, which is closed on matchdays anyway - just leave it for emergency access. You can then extend the concourse out to where the edge of the road currently is. Create much needed room inside.
Put a massive bridge over the railway to eliminate the need for the shitty underpass and replace the steep, and dangerous when busy, steps on the north west side of the stadium with a gentle slop (think like Wembley Stadium). Would be safer and probably help get people away quicker.
Also put some staff in the car parks post game to properly direct people out rather than the current free for all. Do that as well as getting the lights changed so that you can prioritise people leaving the ground for that short space of time and you'd get people away far quicker once the road is reopened.