Grumpy Old Man
Striker
If they build a load of boxes and a 'premium suite' above the East stand lower bowl it will vastly improve the revenue but hardly affect the home atmosphere. Maybe add 1500 (@ average £250+ a pop is about £7m per season). Away hospitality is a thing now, so 76 Yards might become a money spinner there.
For the jump-around/'scenes' kind of fans, the Roker End needs to be a Spuds/Dortmund style Red Wall- all safe standing with affordable SCs and some £40 day sales. Grow the passion.
This increased revenue is a crucial part of the sustainable Prem club we all want to be. They need a plan that achieves this while building atmosphere in the stadium, and making the SoL a destination for other Prem club's fans to spend their money.
Where do you put all the support infrastructure for it? Bars, lounges and kitchens. You can't have all that hanging in midair off the back of the stand. You can't do anything without expanding the stadium skeleton. It's just as easy to extend the upper tier round from where the north upper currently ends.