I don't know what football league standards are, some of the league 2 grounds, don't look all that, but they still manage to get in the league.
Look at Salford for instance, in my eyes there ground is National league standard at best.
I am sure you could all name a ground that you think is below standard but still in the football league.
Lynn have very little parking facilities, and the ground has awful access to it from a policing and emergency services point of view, if the rail crossing barriers come down, you are screwed on a regular basis.