Ideally, Thrawn would want all his crew to learn to shield their minds from invasive Force-users, but they didn't have the time for that, and some might resist Altair. Therefor, Thrawn felt that it was important for two high-ranking officers like Dagon and Parck to obtain such a valuable skill.

"I received troubling news from Imperial space. The rebels have recently won a major victory over the Empire at the moon of Endor, resulting in the destruction of the second Death Star, as well as the deaths of both the Emperor and Darth Vader." He didn't sound too torn up, either because of his natural stoicism or because he honestly thought rebuilding the Death Star was a bad idea. "I fear that the Empire will not survive this loss."