From what I’ve read, the DSP only changes the frequency response so the direct and reflected sound gives a natural (to our ears) response.
This would make a huge difference in a room with reflective surfaces, but the reflections are still there.

I remember when I first applied acoustic panels at the primary and secondary reflection points, my first thoughts weren’t of much improved imaging, but that the sound was dead; this was fixed by updating the existing room correction curves (DSP on subs) and just getting used to the direct sound.

Now I appreciate the improved imaging, especially in Trifield (amazingly better), but it does look a bit crap…

All the best,

Steve