To those of you that frequent the Workshop this may sound like a broken record but please hear me out on this one.
Personally i think that this is rather similar to the original skin, and I also agree with Dntrose on his point that the helmet is 'boring' though i belive that can easily be fixed by thinking outside the box a little bit.

Now please bear in mind that i personally have near to no experience in making 3D-Models and the following is more than just a thing i would like to have changed but rather my idea of an Atlas skin deserving of being named after a primordial Titan; though you may use none or parts of ideas.
One of the things that bothered me quite a lot especially with atlas is that the classic round shape is too smooth for rock. A tectonic plate aestetic with interlocked plates or similar would be refreshing, also the little rock spikes are rather puny and could spread across more of the body.
Further this design seems rather focused on the idealized Lotus flower that's the logo to the game. While i don't dislike the form of this symbol i think that it simply doesn't fit Atlas on a theme level at all.
The colour scheme, while more true to character that the dirt brown rags, it still lacks greatly in depth in multiple regions one being variation others include contrast and similar basics of colour theory.

Saying all that I don't think this skin looks bad just so.. common. It feels like I've seen this skin more often than the back of my hand while still being rather focused on the actual game rather than TennoGen. 3/4 skins at this point in time are like this spanning across all frames and in some cases even weapons. While I don't have any authority on telling anyone anything i greatly recommend you try to bring more of yourself into your skin here and try to make something only you can imagine.

Thanks for reading and sorry for it being so long