The brick wall in this article is quite alike yours.
To be fair, you do not really have many options here, unless you are planning to dive into science and invent some kind of new algo for AA.
For practical purposes, you have to either deal with texture pattern, or try to minimize grass blurriness and accept it to some degree. Might as well try MSAA. You can search the forums a bit regarding reduction of blur for grass. There were several posts about improving it.
Making them less repetitive is about
making them more large scale - thus
non procedural and unusable.
That is not entirely true. In fact simply changing tiling would only offset the distance at which you start to notice moire. You have wide selection of tricks here, ranging from variating color and shape of the bricks subtly to fading to more flat version of the texture and flatter normals with increasing range.