In the sentence you quoted, you literally state that 80k tracks the # of calls and # of career plan changes, but doesn’t track the long-run impacts of their advisees.
Saying “80k tracks the # of calls and # of career plan changes, but doesn’t track the long-run impacts of their advisees” is different from saying “80k focus[es] mainly on # of calls”
In the sentence you quoted, you literally state that 80k tracks the # of calls and # of career plan changes, but doesn’t track the long-run impacts of their advisees.
Saying “80k tracks the # of calls and # of career plan changes, but doesn’t track the long-run impacts of their advisees” is different from saying “80k focus[es] mainly on # of calls”