Redevelopment Root Hall is unrealistic as there house behind west stand & flat behind South stand, it's be a waste of money to improve RH.
On the contrary, there are a multitude of things that can be done to improve stadiums on constrained sites - in the past I have looked at plans at grounds on far worse sites than Roots Hall - Luton, Pompey, Exeter and Watford all spring to mind. Put the topography of the site to one side - you only need to look at the space created by removing the flats on Victoria Avenue, and the space provided via the East Stand car park, and this presents small opportunities...