An interesting move. Shows he's not quite one-dimensional. He started taking his job more seriously when Tarkin took over and had Aresko and Grint executed for incompetence. Now, however... I'm not so sure.
The way that Admiral Konstantine spoke to Kallus when he returned tells me that something got through to the higher-ups that wasn't favorable to Kallus...
I don't think his career with the Empire will last much longer. He'll either defect...or be executed.
Or both perhaps. We shall wait and see.
Also, a reference to the Onderon rebels from The Clone Wars. Wonder if they'll play a part in this later...