Absolutely no need for seating in front of the stand. East and West will provide more than enough seating options. The race will be to produce the best safe standing home end across football. Safe standing areas will be oversubscribed too.
Costs dictates that the seats are left exactly where they are, also being the away end, you need to make provisions that allow less able fans to be seated. Areas of terracing built up behind can cater for those who wish to stand and create a big match atmosphere.
Benefits are that while in league 1 you can divide and have a shared south stand and use the overflow for extra visitors if available.
Expanding the North in the same manner can commence at a later date in readiness for the Championship.
