Ideally, this would be a separate thread (rather than a hijack of an existing one), but here's my 0.02 anyway
It's a little cluttered, it's not clear what the subject of the photo is. Is it the five ladies? Six ladies? The second lady from the right's bottom? (which is placed very close to the "rule of thirds" spot - where the eye naturally wanders

)
The 20/1.7 can indeed throw background out of focus wide open, but to achieve that, you usually have to move in much closer. In other words, your camera-to-subject distance should be much shorter than the subject-to-background distance. This may be different with long telephoto lenses (the "great whites" you'd see at a professional sports event) with their really thin depth of field at hundreds of feet away from the camera, but with a 20/1.7 you're pretty much stuck with having to stick the camera into the subject's face (or some other part of your subject).
If the ladies are indeed the subject of the shot, they seem to fall into two very distinct groups (three and three), each of which would probably make a better shot by itself.
Another compositional problem, IMHO, is that the ladies' heads are right in the middle of the frame. Tilting the camera down so that the heads are closer to the top of the frame, or maybe even getting a bit lower for the shot - both would include a bit more foreground - may have been a good idea. Once again, generally, you would want to keep the most important things in the image roughly a third from the edge (you can bring up the "tic-tac-toe" grid in all mFT cameras, I think, and watch those lines and their intersections).
The lighting was mixed, which usually presents a challenge. The tops of their bodies (heads, arms and bits of faces) seem a reasonably natural color, but their legs look either sun-burnt or painted orange
You can do things to this image in post processing (clone out stuff, crop differently, do selective blurring, change color balance, etc. etc.) that may improve it a bit, but they would probably be quite time-consuming.
That said, it's a nice slice of life snapshot, but not much more than that.
Was it the brutal critique thread? No? Woops!
Hope this helps, though.
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p.s. Nah, I don't really practice what I'm preaching here. (as my gallery here confirms)