Those are good points.

The noise floor in my room is less than 20dB C-weighted. I don't know how much less because that was the limit of the meter. I typically listen at 85dB nominal. This means my signal to noise ratio is greater than 65dB. I don't know if this is "good enough" but even if I crank it, I have no depth.

My ears are right in line with the tweets.

Whether I engage processing or not makes no difference. I don't have a front sound stage setting. I've never heard of that setting.