Can't read the article without going to the faff of registering, so, just going on the headline, if the Government can find £4million to tinker with the curriculum, I personally would far rather it were used to find enough special school places so so many of our most vulnerable children aren't left without a school place.
But in terms of if Latin is useful or not, or as you are suggesting that it is far less useful than Spanish, I have to disagree with you OP - or, agree with so many other posters.
Latin is the root of so many other languages, and a good understanding of Latin makes learning other languages so much easier. Then it is useful in medicine, law, history (so many aspects), literature, art. Just general 'wandering around a Cathedral or even village Church on your holidays'. I am an advocate and think it would be a great things for everyone to have a grounding in.
Just cross that this is a policy because it will appeal to a certain demograph of voters rather than because it is the most urgent thing to address in education.