I'm a Vector level 100 (Kotaro BRZ), I already reached the diamond, and I say that the Vector side sig bow needs a rework.
It has a weak where there are hitboxes only at the end of the side sig animation, in addition to being a slow signature and relatively easy to punish. In the current animation, Vector takes a long leap forward and spins his body at the end of the animation. In the new rework, Vector will travel the same distance as the current side sig, but now he rotates his body from the beginning, instead of only turning at the end, which will make it possible to add hitboxes from the beginning of the signature.
The final signature animation needs to be scaled down as it is slow and leaves you very vulnerable to punishment.
In addition to having these new features mentioned, I suggest adding the possibility of repositioning the enemy when hitting the side sig, that is, being able to send him forwards or backwards at the end of the side sig animation from the inputs "front" or "back" (as in Mordex scythe down sig), I suggest this because Vector's sigs don't work very well in Team Combos, it is noted that sigs with the potential to change the trajectory in which the enemy is launched have a great efficiency in Team Combos.
Therefore, Vector's new side sig needs to have hitboxes from the start, a faster animation, and the ability to change the direction the opponent is thrown when hit by the side signature. I made some drawings of this idea, if you want to see it just send me a private message. Thanks.