If the posts were taken out would the stand collapse?
They're not there for decoration!
Seriously, you could remove some if the roof on each stand were supported in some other way (e.g. trusses supported by new towers at either end). The Bullens Road could be improved massively by converting the parts under the current upper stand to Exec boxes (which means the posts supporting the current upper stand could stay) and replacing those seats and more with a new, cantilevered tier and roof over the current Upper Bullens.
You'd need to buy land behind the stand to build the support structures for the new tier, but not much. And you could end up with an imposing edifice to rival the Main Stand opposite, an increase in capacity, fewer restricted views and more than double the exec boxes.
I think the GFE plans (circa 1997?) had an option for additional boxes/premium seating slung underneath and near the front of new roof structures all around. They looked cool as all f***, but a not the best idea from anyone who finds the Top Balcony vertiginous!