Thanks for your very interesting post...
You made me understand in a better way my intuitive use of absorbing and diffusive ratio in my small room...I use reflectors to diffuse the sound in a way that gives me the first venues cues...I create that with my ears experiments and intuition and for me your explanation makes more sense of my experience for myself now indeed...
With more conventional speakers the same principles apply, including: Minimize the early reflections (via diffusion or angled reflectors