I know on the IDR you can use the M-MMO (mini multi out card) to get both ADAT and Hearbus connectivity.
It would be great to have someting, to get either 1-2 ADAT and/or 1-2 hearbus outputs from the SQ series.
After all it takes up 8+ analog outputs per Hearbus string, and we introduce an extra set of latency for the musicians/singers.