@TizerorFizz
None of my DCs who have done liberal arts degrees in the US have graduated without at least one year of statistics beyond AP level, and Calc III. Degree subjects have been theatre, economics, anthropology, psychology (private universities). One DC did a degree in biology with a minor in chemistry, and thanks to School of Liberal Arts and Sciences degree language requirements in their specific (state) university is fluent in German. The choices available to this DC for a language were German or Latin, based on courses taken in high school; an interest in beer tipped the scale.
The breadth vs depth idea is based on an assumption that the purpose of an undergraduate degree is to demonstrate mastery of a certain body of knowledge in a given subject. While you obv need to know your stuff when it comes to your major, I see in the eastward creep of the liberal arts idea an acknowledgement that it's the communication and analytical skills, the familiarity with a range of subject areas and ability to make connections among them, and the intellectual versatility involved in mastering abstract mathematical reasoning that matter. This means that the subject you take for your degree, while an indication of deep interest and knowledge, isn't necessarily what you're expected to work at, or more importantly, what you're confined to working at, for the rest of your life.
I can see a reassessment of the early specialization in English secondary education on the horizon, as liberal arts degrees become established in top tier UK universities and employers come to see the value of wider skill ranges. I suspect the IB will become ever more attractive too.
Either that or degrees that now take three years will shift to four, with a 'core' or 'general education' quotient taught in the first year(s) as in the US, and a multitiered third level system will become even more stratified, as there will be many students who can't hack stats or university level physics or English lit or a MFL.
Leading UK universities are also keen to attract international students who might otherwise head to the US - more and more, the centre of gravity in third level education in the anglophone world is the US.