Law still covered up a great deal of sex abuse. For that reason alone, he should have been kicked to the curb.
Law was apparently cleaning up the problem -- quietly, not fast enough, but he inherited a huge problem. Check the MA AG's report: the number of reported cases started a clear decline after 1984, when Law took over. The AG -- reluctantly -- reported no ongoing problem at the time of the 2000 report. (The numbers in the report are broken down by decade, not year -- but combining the 40s and 50s and with a break at 1984; by year would have been better.)