I think the best thing we could do would be to build a new Railway End and Popside which might marginally increase the capacity from what it is now, but build them in such a way that second tiers could be added easily later as necessary. There’s also potential to expand the Main Stand in each direction to run the full length of the pitch if the office space currently there is replaced elsewhere.
There’s definitely the potential on the EP site to build a modern ground to be proud of without losing what makes EP great, I will continue to bang on about what Fulham have done with Craven Cottage as an example of how it can be done properly. They’re arguably even more constrained by space than we are.