Your sounds are way too quiet. I've looked inside the .BNK files but i have no idea what it causing it. I have looked at the samples and they are usually way too long (imo) which jacks up file sizes, considering they're huge uncompressed .WAV files. If you can find such constant samples, why can't you reduce the length? I've also noticed the samples don't have very much volume when played back on the computer, but not nearly as quiet as they are in-game. For some reason your samples have a sort of phaser effect.
Here's a trick in Audacity to give the samples more aggressiveness: Start with splitting the stereo track in two. If both tracks are EXACTLY the same, do a CTRL+A and do a mix and render. If the stereo tracks are different, pick one that you like or with the least looping artifacts, Use a hard limiter of -3.0 dB. Amplify it by 3.0 dB. Apply the heaviest leveler, and then use a hard limiter of -3.0 dB. Amplify it by 3.0 dB. If you have any silence select the silence and hit DEL. Do a CTRL+A and select zero crossings. Press the crop button. Then time shift the sample forward, then to the start again. I like to change the sample (pitch/tempo/speed) BEFORE doing this trick.