I honestly don't see that happening if they are doing this weirdo construction now,
I dare say capacity will in fact shrink
there salso not any realistic thing to do at the powerlines end because of the aforementioned powerlines.
if it were me, I would have
1. Moved the playing arena south by 10 meters or so so the fence line is where the porter stand footpath is
2. knock down all the concourse seating at the place and rebuild it at a steeper rake ala bankwest going back say 20 rows. have this at the ET side, the Burns side and the Hill Side
3. Extend Upper ET North and SOuth with undercover seating ala what Kogarah looks like
4. Extend the Burns stand north and south attached to the new fixtures for the hotel and club (keep the club gronk deck above)
this model, for mine will be a bandaid and by 2030 we wont be playing there