This is, of course, concerning, but I seriously doubt the suggested enforced 3h of learning is going to change things one iota. IMHO, the biggest problem is not how schools are teaching core subjects, but how much learning is happening at home.
I say this with no judgement. Parents are, increasingly I feel, using a tablet to babysit their kids when they are younger, and not monitoring their social media use when they are older. I would also be interested to learn how much reading to your kids has declined. I could be wrong, but I suspect it has been slipping in line with the PISA results.