With as few Parts as the BK has compared to Roland's TOTL arrangers (3 UPR, 2 LWR on G70, 2 UPR, 1 LWR on the BK), with no VH, without a touch screen and easy editing because of it (those little displays make the Makeup and Cover Tools a harder job), without individual outputs, without footpedal AND two footswitch inputs plus the FC-7 (only one footswitch/pedal and an FC-7 on the BK), without the Guitar Mode, no, sadly, this isn't the replacement module for the G70.
Mind you, it makes a VERY capable replacement for the E50/60.
To my mind, this, in a case with a 61/76 with speakers is the new E MOTL series. Maybe a Prelude II...