Welsh Bacc (Advanced) - advice

Hi all. Although I have long finished school and uni, I was hoping to get your insights / advice on the topic of the Welsh Bacc (Advanced). My cousin is currently in Year 12 at a school in Wales. She is studying 4 AS levels and is hoping to achieve A*/As in all of them. Her problem is that her school is also forcing her entire year group to study the Welsh Bacc. From what she has told me, it sounds both stressful and a complete waste of time. She doubts that it will be of any value to her, as she wants to apply to universities in England (most of which do not recognise the qualification). Although she normally is NOT a person to rock the boat, she is getting so frustrated that she is considering just not turning up to Welsh Bacc lessons and refusing to do the work. She is, however, worried about the potential consequences of her non-compliance. For example, could the school give her a negative reference when she applies to unis? Or detention? Worst case scenario - could they kick her out of school for non-attendance of the Welsh Bacc lessons even if she does well in all her AS levels? If anybody here has any experience of dropping the Welsh Bacc without permission, I would be interested to know how your school / college reacted. Thank you.