It's a reaction that most direct reports will do a better job masking when they hear their goals. It often has little to do with the goal itself, unless they're the impassioned type. The "That's it?" reaction happens when direct reports don't get it. They understand what the goal is, and how it's being measured and all of the technical components of the goal, but they don't see the big picture. "It's a little abstract." They don't see why it really matters and as a result, aren't behind it 110%.
That's why you must include your direct reports in the goal setting process. We know - sometimes their ideas aren't great. It's OK - we're going to show you how to involve the direct report in the goal setting process without being held hostage by bad ideas about goals. You can include them and maintain control of the process.
The more you can show they had input, the more you win by increased engagement towards the goals. Take a look at this episode of TalentTalks to learn more/how.