That looks to be an OD aluminum case, not the Direct Connection performance piece. The DC unit had strengthening webs at various points on the exterior and I don't see those in your photos. I once asked Brewers about using the OD case in a performance application and they told me to avoid it like the plague! Regardless, the countershaft has had the front bore bushed - its clearly visible - so whatever it is, it at least had that done right.

If the scratches you're referring to are what we see on the ends of the teeth, they're normal. If the scratches are on the face of the teeth then you may want to look into that.