Whatever the rights and wrongs of the development (or otherwise) argument, the bit quoted above would still happen even if we had a 20,000 seat stadium. Bigger games would be made all ticket / database only to prevent away fans rocking up and paying on the day to get into home areas.
I'm aware this happens now in some games (Sheff Utd anyone?) but that doesn't mean the club still wouldn't put measure is in place, even if the hypothetical 20,000 stadium was only getting ~5,000 a week
try a hypothetical 12000 ground, kelvin pulled the old over exagerated 30k nonsence to scaremonger against a ground redev..
If you suspect over 12000 will want to attend..all ticket
If you susoect 10,000 may attend.. promote it to the hilt, get in some revenues.
With just 7000 we have no choice but implement restrictions on admission several times a season even in our awful non leaguesque ground.