By and large, home fans don't want to sit in the away end even if it is a utopia (it isn't. It's a no frills stand with basic facilities. I think that's how the press release about it described it before it was built.) For 15 of the 16 league games that home fans could go in it, it has been about 1/4 full. Some games, like Rotherham, there can't have been more than 400 in. The biggest crowd in there was Brentford, and even then it was no more than half full. So for plenty of games where fans have a choice to sit in there, they aren't choosing it en masse.
They most certainly shouldn't be moved out of there for some (probably any) games though. It pisses of fans who do want to sit in there and and usually there's no real need for it.
But fans who turn up every week and want to sit in the home end aren't holding the club back. And the Chaddy End being the home stand isn't costing us thousands of fans. The gaping hole that is finally being filled and 17 years of third division football with little prospect of promotion is what has been costing us thousands of fans.