The novel "Catalyst" makes it explicit that Krennic was an expert in keeping info compartmentalized. He had several different research teams who had zero contact with each other. In some cases the existence of certain teams/data was hidden from others. Esp from Galen Erso.
Lonni learning all that stuff from Dedra made me go “ahh I don’t know about all that information being available in one place, feels like they’d be smarter than that” and then Krennic barged in like HOW THE HELL WAS ALL THAT INFORMATION IN ONE PLACE, WE ARE SMARTER THAN THAT!!!