Ime there seems to be a "sweet spot" as far as how loud the reverberant sound is relative to the direct sound. The larger the room (the longer the time delay before the "center of gravity" of the reflections), the louder the reverberant energy can be before clarity suffers.
And the complement to your point is the following, no?
The smaller the room, the softer the reverberant energy should be before clarity suffers
So in a small room, I can't imagine actually wanting to enhance the reverberant amplitude or timing per se. To my ears, the congestion in clarity, especially dialogue suffers too much.