Sounds like Ken320 can help.. I am not familiar with East-west products. Generally if the drum is one sample, you're at the mercy of it. In kontakt you can go into edit and sometimes change the envelop of the sample. Play carefully with the decay and sustain, release. Attack obviously should be set to 0 or very close. If Stormdrum has layered samples, and you can edit these.
Also remember you can layer two drums together to get a desired effect. If again you can play with the ADSR;s you might get what you're looking for. You might be able to write in CC events in your Daw to control Filter, resonance, brightness. Google 'CC events' These are commands that can control an instrument if it is set up to respond. You can assign a knob, slider, and just move it as song plays to open the filter on one layer.
As one 'get's into the details', he/she can do quite a bit with drawing in and writing CC parameters, duration, velocity.
You might be able to get away with writing velocities, durations (not all VI's will respond to duration with drums, it's just generally a trigger on, to start the sample, VCO. Etc. That varies from virtual instrument.
Where StormDrum is dedicated to drums, there might be a lot more variation in what you can do.
Check any forums that East-west, Stormdrum might be on (KVR). Maybe even call them, if they have tech support. Some companies have none, some are very helpful in assisting someone trying to gain all the perspective on their instruments
Good luck