Hye didn't need to check over the formation, as he didn't know a thing about it. If he went there to check it, he'd prefer to use his flagship and launch tons of attacks, see how this formation would look at the end of this.
Yet this wasn't how he wanted to check over the formation's integrity. The formation ran on a power source, and he wanted to know how much power would get consumed to keep it running in times of peace and war.
He also wanted to see if his research department could repair the axis points correctly. It was essential to keep the formation running all the time, and he needed them to check for all possible faults and hiccups they'd face over time, and how to fix all this.
There were tons of tasks awaiting for everyone to do. In addition to testing the formation, they needed to go around, check the planets and mines, gather up the large worker base, and arrange them to teach others how to mine the crystals.