Argus is pretty cool. Before recently, the PTR was pretty buggy, so it wasn't super fun, but that last build (24608) seems much more stable and has a large percentage of the patch working, supposedly. Check it out.
Also, if you have a rogue (I do, but my DH is better for survivability), try to get some screenshots of mobs close up.
I did a massive screenshot dump from the first fragment, Krokuun, but I need to get more stuff from the other fragments that just opened up.