Bring more balance in the game (upgrade 1 r7/8 instead of 2).
Dear Niantic (Ingress),
It would be more interesting if the person who caps the portal can place 2 R7/8 and the people who upgrade only 1 R7/8.
For a P8 portal you will need 7 people instead of 4 and for a P7 portal you need 2 (just like now).
This will bring more balance in the game.