That's a drum tool i've dreamed since long time and iZotope breaks my expectations in most details. The flexibility in mixing / playing with very different and very unusual rythm scales is hmmm...
For me it could have a bit more flexibility - i.e. the availability to add further tracks or insert external effects (i.e. by busses) to the effect chain within (!) the synth/sample engine. But this would be just nice to haves.
While the strong CPU resource affinity in some DAW modes are not so hard anymore because of newer comouters - one problem is not available (vor very difficukt to simulate) micro time of notes, which are important for pro grade producer usage in most types of music and as a feature in most tools (i.e. on Arturia or in my DSI Tempest Hardware). If iZotope would add this as one further option (step and i.e. full track) this would help BT on a new level.
this two things iZotope gets one point minus from me - resulting in 9/10 points.