The SDK lists 4 options for the structural_deice_type entry in systems.cfg; 2 of those entries (2 & 3) relates to leading edge deicing boots. Option '3' (engine vacuum pump boots) is a perfect fit for our aircraft. However, the deicing action that takes place when the structural deice event is fired is a very slow melting action - with a resulting reduction in structural icing at about 1% per minute. Cycling deicing boots should result in an immediate effect. (While it might not be accurate that deicing boots would remove all accumulated ice, it should definitely be a significant effect.)
If this is as intended, or not finished yet, I'd propose another configuration line, such as structural_deice_rate, where the number is a scalar on the rate of deicing action - with a zero being instant.