The "pointless dude in hood on the cover" isn't purely a recent phenomenon.
In a new interview with the New Zealand Herald, Bujold expands on this, citing the failure of her novel Paladin of Souls in the UK. The book was not well-marketed and had some pretty terrible cover art (see above). The book sold less than 10,000 copies in the UK, which is unusual for a book that sold hundreds of thousands in the United States and bagged numerous awards, including both the Hugo and the Nebula. With the failure of that book (and the apparent under-performance of several earlier novels when UK editions were attempted), British interest in her work dried up.
This isn't unprecedented. There quite a few authors who are big in the USA but obscure in the UK, or who once were big but have since dropped off the radar. But the sheer disparity between Bujold's American profile and her lack of success in the UK is quite remarkable.
The interview points out that not having a UK publisher isn't simply problematic for attracting would-be UK fans, but also causes issues in getting English-language copies of books to some Commonwealth countries, in particular New Zealand and Australia. However, Bujold cites the rapidly expanding profile of ebooks in helping her win fans worldwide.
She also discusses her new novel, the trouble with writing villains and how she handled her protagonist Cordelia, a woman in her seventies living in a society where people can live into their 120s in reasonable health. It's an interesting read.