I think that expecting BALPA to have foreseen the regulatory changes which have enabled OpenLies is unreasonable.
BASSA have a record of being very blinkered in their thinking and planning. They have no agreements relevant to OpenLies which would enable them to have any involvement whatsoever. They are possibly too short sighted to care either. For many years they have protected the outrageously outdated situation at LHR and cared little about anywhere else. For an example a look at LGW CC, the working agreements and salaries there says it all.