The greatest problem with the Mecha Avatar technique lies in the perspective.
Compared to Star Moon's information processing capabilities, even with the enhancement of Qi's power, Ji Xinghe finds it challenging to see everything in perfect detail.
And the inability to see clearly means that during combat, he can only rely on his reaction speed. Regardless of whether it's the remote control mode or the Controlling Mecha With Qi mode, both significantly reduce Ji Xinghe's reaction speed when piloting another mecha.
For Ji Xinghe, however, this actually... doesn't matter.
Because what he truly wants to master is not the Mecha Avatar technique.
Whether it's controlling two mechas simultaneously or three, fundamentally, it cannot resolve the problems Star Moon faces, the issues the Independent Group faces, or the challenges the Federation faces.