Visualization meditation has nothing to do with vision, as in eye consciousness. It is the mental consciousness that is used. Because we use mental consciousness, and not eye consciousness, depending on the practice, one is not limited to just imagined images, there is sound, there is even smell and feeling involved.
Understood. But these visualisations are heavily weighted in favour of the visual, which I find very limited.
It's all imputed anyway, but I have seen no texts or sadhanas which describe the other senses as extensively.
It depends on the sadhana's and the lineages.
I have notice for example that Nyingma sadhana's quite frequently integrate sound into the overall atmosphere of the mandala. Especially with wrathful yidams and their retinues.