I have offered to do some potential charting when the RBN comes out for the local bands around my area. Thing is, they're metal. Well, most of them. I think that it's wrong to only play half the bass drum notes on a chart that's already so realistic. So, I came up for a few ideas:
1. Release two versions of the song: one with Double Bass fully charted at Expert level and one without.
2. Release one version, but kick every chart level up a notch. For example, Hard would be equal to the Expert chart, while Expert would be charted with double bass.
I think the second one would make the most sense, because if you're playing the hardest songs on Easy drums you may as well make the jump to medium at some point, even if you're just at a party or something; the jump isn't something that's THAT hard to get around.