I spent a lot of time on A300/310, but none on the A320. I will assume similar architecture.

" Profile" cruise would limit autopilot pitch authority to +1.15/-.85 G. Pitch was used to maintain speed within these parameters. The real goal was to limit autothrottle movement and reduce fuel consumption. The book said a 1% reduction in consumption.

I never saw more than 50' variance in reasonablr air. RVSM compliance was never an issue, and ride smoothing for pax was a secondary benefit.

Moutain Wave, or moderate turb would necessitate an exit from "Profile" and restore full autopilot pitch authority.

320/330 drivers : is this similar in your jet ?