Please, some could create a preset for WoW less colorful? I would like something more greyish, less saturated but not transform the yellow green and red purple ... I would just remove the excess color.

Make it yourself with ReShade. The creation GUI isn't hard to use once you understand it. Also, if you have an image editing program like GIMP, you can use that with ReShade's LUT feature to beat the tits off of SweetFX. You can probably find a YouTube video for making a ReShade preset in the assistant GUI and I can explain how to use a LUT.