I can only tell you what Quorn confirmed. They are in the process of redeveloping a lot of their products to be vegan? But like I said, there's already quite a few. I'm not the biggest vegan cheese fan either, but it's all personal taste. Obviously there are plenty of vegans that buy it, in fact Koko and Dayia are two of the post popular choices for vegans.
As for the soy scaremongering, as a doctor, I can confirm that's completely untrue.
I'm not going to argue about it with you, like I said it's all personal choice. I just wanted to state the fact that like me, it would be easy for Jen to get back to target vegan, but she clearly needs to address her issues with food first. Slimming world doesn't teach you that and she will continue the cycle until she does.