As for the original idea of the floatplane adding to ASW I still believe its a valid suggestion. The sub is "suppressed" by having to dive. Even if it listens the time spent submerged has delayed attacks, merchants diverted and possible more air/ships on the way. Though there is some off set by this radio signal intelligence it is overall an inconvience to the sub. The odd actual damage by the floatplane being really more of a secondary affect.
I agree and the team should investigate how to implement it, without adding to the complication.