Rejected technical issues not specific

There was a discussion just the other day about some graphics that were rejected that were made in Photoshop.  The consensus was that simply submitting a graphic as a photo instead of a vector may be in a to net a technical rejection.  Regardless when I look at this, I believe having it as a vector would be more appropriate.

There's some other subtle things in here as well.  Like @RALPH_L pointed out that when zoomed in the edges appear jagged.  The graphic isn't centered in the frame, and the line splitting the two colors of the circle is also not centered.  The bow tie, the circle, and the dog all appeared to be varying levels of sharp & blurry.  I don't know what if any of what I mentioned the reviewers paid attention and I believe them to be correctable.

I wonder if the dog graphic would have more commercial value without the bow tie and colored circle?  But the commercial value isn't in question here.

Good luck!

View at 250%. The edges are not sharp.