In other words: the aesthetic design goals seem to target people who aren't in to the gear (hence making it more lifestyle diminutive), yet the people most likely to be interested in paying that much money are audiophiles, people in to the gear, who would generally have less problem with a larger design.
So your assertion is that people with high disposable income are not into design? Colour me sceptical.
I think "sound quality at all cost, screw the looks" is not going to be a dominant part of the market. Most people will have some sort of weighting between appearance and audio.
And KEF already do have much larger towers, so there's no point adding a new product to cover the same market. This is does not resemble anything they currently have, so will get different customers who might not have considered a boring-looking R11.