Gradient mesh symmetry capability
I enjoy using gradient mesh and I think it would be great to be able to create a symmetry of gradient mesh paths when creating an object that requires symmetry in other words an object such as a computer screen design that I would like the left and the right colorations to be exactly the same. By doing this, there would be a half way symmetry point such as a rectangle or square where the halfway line would be the one of symmetry. So by creating a mesh line on the left it would automatically be created on the right.
Currently to achieve this, I create the object detail on one half, then duplicate the object, reflect it, and use a clipping mask to hide the half I do not want.
Yes, at the moment Object > Repeat > Mirror does not support mesh grids. I have no data on if the team plans to extend the functionality.
Another solution you can use for now is to apply Effect > Distort & Transform > Transform effect to the mesh or a group of meshes. Then specify a reference point to the right, toggle Reflect X, and set 1 copy. This method works on anything. The only problem with it — it won’t allow you to define a mirror line. Even if you clip the mesh, it will still be based on the bounds of a clipped content, and not the clipping mask, unfortunately (and there is now a request to provide this option: http://illustrator.uservoice.com/forums/601447/suggestions/46960159)
The workaround to this problem would be making a large enough no-fill-no-stroke object, center to the mirror line and group it with your notebook, and use center reference point for the Transform.