I must admit that I have zero experience with pure pattern planes. I've flown a couple of sport models that were very close to dead neutral and yes they did fly as you're saying. One even used to try to tuck under slightly in a long dive. So yes I'll admit that a neutrally set model will do as you say. Most of them have a touch more stability built in and wil fall off into the spiral I described thanks to the trim that provides that stability.

We seem to be coming closer to the same line with each post.... :surprised