Boeing are fixing it.
The reason they are fixing it is that it is broken.
Perhaps so, but it's also important to understand why the crews of the accident aircraft did not handle the situation they encountered. We don't yet know what happened in the Ethiopian accident, but assuming that crew encountered something similar to the Lion Air crew, why did neither crew think to deactivate the electric trim in sufficient time to recover the situation? Was basic training a factor, or were they simply overwhelmed by the number of warnings that occurred?