The thing is, they can. People will pay to stay onsite. So where’s their incentive to spend more?
Both towers serve a purpose. The Gran Destino is aimed at conventioneers, and suits the bill from what I see. A step up from the rest of the rooms at CSR and more “appropriate” for more senior people.
Riviera is a wholly DVC property. Those who have bought there, and those who will over the next couple of years, will in the main be able to pick from all the other DVC resorts if they want a change, dependent on availability obviously. There’s a broad range of options and there are many, many members who love SSR and stay there often. Not much in way of theming there at first glance. DVC is meant to be a “home from home” for a few days. Of course some people would prefer something like AKL or WL or the Poly, but every resort is a favourite of someone. My “boys” in their twenties would choose Bay Lake first every time, they love the modern decor there. So BLT and somewhere else is what we do. They also loved Kidani and BCV, but BLT remains their #1 choice.
And back to your quote above, to me the look of Riviera is infinitely preferable than that of any of the tower condos around Orlando. Theming doesn’t have to be “in your face”; I love the videos of the rooms at Riviera, marble bathrooms, the artwork, the light fittings, the mirror, the stable door feature, the metalwork on the balcony.