To me, the problem with a neon sign is that our stadium is barely visible to any roads. We already have the giant LOUISIANA on the scoreboard that stays on which you can mostly see from Congress. But most of the stadium except the 1B side is blocked or not visible. And it's still pretty far away from the road. And you can kind of see parts of the stadium from Bertrand, but its not like a big street runs right next to the field.
Now lets say it was moved directly to the corner of Congress and Bertrand (in current parking fb parking lot) then I could see having something like that where lots of traffic could easily see it.
It would look good just to walk up fans though