Hello Andy,
An ODF can implement an inertia model (or similar means) between the virtual swell pedal and the virtual swell shutters, specifically to help reduce the unrealistic nature of dynamically changing effects (especially if rapidly changing) being applied to wet samples (attack/sustain phase as well as the releases), but that's the main inherent comprise of wet samples, compared to dry. (The same compromise applies to modelled tremulants, modelled wind fluctuations, etc..) St. Anne's has such an inertia model for that reason, for example. (There are no other mechanisms in Hauptwerk to try to work around it.)