Because ultra-intense ultra-short laser has a large beam in space and a short pulse in time, the spatiotemporal coupling effect, for example the pulse-front distortion, frequently appears, which leads to a separation between the pulse-front and the phase-front in space-time, such as the pulse-front tilt or curvature, and is not conducive to obtaining the expected high focused intensity. However, when this pulse-front distortion (control) is applied in the X-shape optical wave-packet, a new degree of freedom is introduced for freely controlling the group-velocity and the group-acceleration of the optical wave-packet, enabling superluminal, subluminal, accelerating, decelerating, and even dynamically-controllable group velocities. By reviewing the pulse-front distortion (control)'s adverse effects in the ultra-intense ultra-short lasers and its special performances in the X-shape optical wave-packets, we try to provide some reflections on the cross-application of the same optical phenomenon in different research directions.