That is good news for the ATCs and also to the pilots but bad news for the government...gastos yan eh.
Although it could have not prevented the accident, but (Davao ATC) having radar could have issued a much earlier alerting service and notification of search-and-rescue. when you see a target on radar suddenly disappears, you initiate something. without radar, ATCs cannot see the aircraft and will rely only on pilots' reports.
Its a sad fact that the government will only act on something only when accidents happen and lives are lost.