Any redevelopment will involve demolishing the Town End first, which isnt going to be popular.
On the Late Kick Off clip they said that the West Stand at new grounds including Brighton's is usally the main stand. The theory behind this is that at a 3pm kick off a West Stand is always in the shade from the sun and you're not looking into the sun.
As the Town is our West Stand this might be why it is the focus of the redevelopment. I would have thought with the CG, redeveloping Statton Bank first would have least disruption as it would bring in unused space and then when the Town End is done the home fans could swap ends for year or two. Keep the away fans in the North Stand corner until it's all finished then move back to the Statton Bank.