I too would like to see some seating that wraps all of the way around, with tunnel entrances for the team. It doesn't have to be as tall as the south endzone... Maybe a third of the way up? That would be, what, 5,000 seats at most?
5,000 seat in new north end
(1,900) existing seats in the endzone fun zone that get replaced
(500) existing seats in those temp metal bleachers in SE and SW corners
(500) existing seats on west side when bleachers get converted to chair backs
The result would be a net increase of about 2,100 seats. Enough to provide a measurable increase, but not too much that we wouldn't have a hope of filling it.
Chairbacks:
West side currently has chairbacks for part of Sections 4 and 6, and most of Section 5. My plan would result in chairbacks for sections 3 thru 7 that match the number currently in Section 5. Because chairbacks take up more room than bleacher seats, we would lose a little capactiy on the west side. However, we would be able to sell the chairbacks for more $$ than bleacher seats...