Commbank and QCB should be the inspiration for the new Penrith.
Cbus whilst not a bad seat in the joint, is very much an "Ikea flat pack" and lacks some of the well thought out basics like having the ability to see the game whilst in the concession areas due it having a single tier of seats.
The one thing all 3 stadiums share though is the placement of all the corporate facilities on one side which helps significantly with building cost as you can place all the food prep areas in one central location.
Below on the west side in grey is all the corporate areas at QCB. You at least can get season and regular season tickets on that side though (blue) whereas at Commbank the west side is purely for corporates but happy to be corrected though if this has changed the last few years.
I actually think if the stadium at penrith follows a San Jose model you increase the construction cost and set up an "elitism" effect as the general punters are mostly up higher on the sides and the corporates are down at player level.
QCB has a big grassed open space up the northern end behind the big screen like San Jose that the club is trying to turn into a social area. The old joint DFS/1300's had the bundy bar underneath the small west stand which was great for pre match and post meet ups so they're trying to recreate this. The problem now though is there is no shade so the club sets up 30 or so tables with umbrellas on game day whilst you gotta commend them on setting this up, it's a little "povo" when you have this beautiful $300m stadium 20 metres away and your standing under a XXXX umbrella trying to avoid getting fried by the sun.