It's hard to find 4-5 people who can all set aside several evenings a week. Reserving only one night doesn't necessary limit play to that night, but it's a base.
i agree that is why people turn to the PA.I don't think VNet as such is the problem. It's more the player quality/morale IMO.
if the people at the PA had faith in the games organized in vnet there would be no PA. if you have problems committing, then you could simply sub in PA games when you feel like it, and perhaps PA games could leave an extra spot open for reliable non-cheaters from vnet to join on occasion as casual players.That's why I'd like organised players like those at PA to use VNet too sometimes