From your first link:
But Plaid Cymru spokesperson for Children and Young people, Heledd Fychan MS added that they believed that there were better ways of measuring students’ abilities than exams.
“Congratulations to everyone who received their A Level results today,” she said. “It’s fair to say that all learners have faced all kinds of challenges due to Covid, and have done their best under difficult circumstances.
“Plaid Cymru continues to question whether sitting exams is the best way to measure young people’s abilities and attainments.
“We believe it is time to explore putting greater emphasis on continuous assessment rather than examinations.”
I mean this seems a reasonable point in principal, we used to have much more coursework when I was younger and we were less reliant on the final exam for our marks. I've read tons of stories about children expected to do well in this years A levels who performed badly on the day. Continuous assessments could suit children better, it depends on how they are planning on doing them.
Its also worth pointing out that this is Plaid Cymru calling for this, they are not currently the government in charge of the Sennedd, labour are. So this is like panicking something is going to change in the UK because of something a Lib Dem MP spokesperson said.
From your second link, again some even more random group has called for all schools in welsh to be welsh medium schools. However the actual sennedd has said:
A Welsh Government spokesperson said: “The success of Cymraeg 2050 demands far-reaching changes and actions, and we’re committed to helping guide our schools and workforce along the path towards more Welsh language provision.
“Cymraeg is at the heart of our new curriculum, which sets out clear Welsh language development progression steps for learners, including English-medium schools.
Which indicates they want better welsh education in wales, and have commissioned a study to look into this, , even in English medium schools, which is not the same as wanting to change English medium schools to welsh medium schools. The only thing they have done is launch a ten year plan to get more welsh teachers trained because there is a lack of them.
Have you considered moving to England if you are that concerned about welsh education and your children having to learn welsh?