I agree with Matt.
The truth is that acoustic simulators don't really work that well. They certainly make the electric guitar sound different, and the sound has something in common with an acoustic guitar sound, but they aren't that good. I have a Ghost piezo system on one of my guitars, and even though it's cool, it doesn't sound like an acoustic.
It's just really difficult to get a solidbody electric to sound like a hollowed out dreadnaught.