1) why would you put all the DBC info into SQL, if the game used DBC unless overwritten by the SQL?
(if the DBC and SQL match, then you replace Source by Source, eating time, memory and is just a waste of recourses?)
2) no its not related to "we dont touch DBC files, its plainly related to wasting recources, the TC2_SQL table is OVERWRITING the DBC values, so copying all the DBC values to the SQL makes no sense whatsoever