Add syspref to be able to define default value for diferent positions and marc templates For example position 6th of 008 related to date, by default is 'b' unknown date, when it is very common to know the value of the date, then 99% of cataloguin requires updating the value perhaps [template, position, value]
You can not set each position individually, but you can use the default setting on the framework @ subfield with the full string to do some presetting. Maybe this helps in the meantime.