It would be nice to add 2 more tracks to BIAB.

One: for fills, breaks, single shots, etc. From other real drum tracks, other than from real tracks selected.

Two: for accent instruments and SFX...Wind blow, bird chirping or hamster chewing on #2 pencil... that is used once or twice in the composition.

or just use these 2 as your regular mixer tracks.

P.S. Yes, I am aware of Realband, but I am talking about BIAB smile