[QUOTE=Graham H;1218859]What other functions?[/QUOTE]
I’ve never really liked the idea that the BT form is about emergency actions, etc… though some of what is in the form certainly has aspects of this.
In terms of other functions (from a WT perspective):
The BT form has different body methods for getting power into the strikes (compared to SNT and CK methods and functions).
The quality/type of power is different (more whipping power, if that makes sense) - compared to SNT and CK methods/functions.
The tactics used in striking are different (the ‘how’ and the ‘where’), especially in relation to the parts of your arm you are using (compared to SNT and CK methods/functions).
The timing (and to some extent the nature) of the bridging is different, when compared to SNT and CK level material.
And no doubt much more
but this is surely not unique to the WT way of things, and I am sure that your lineage has much of the same. Or perhaps much of a slightly different.