Theres a plus and minus to having a bigger ground
Say your playing salford or celtic its very difficult to get the crowd going as the atmosphere is not there
but i think the two advantages outweigh that
you can put on big advertising campaign and lower priced tickets like wigan do (we usually get 1-2 20k+ gate each season) which means the atmosphere is always amazing
You have the chance to host internationals which raises the profile of the club itself
I think the gates of warrington will only rise if you continue success and that is not even close to being inevitable