As long as it's your stuff and your money, you can leave it to whoever you like as long as your will is expressed clearly and is properly witnessed. If you don't leave a proper will, the laws of intestacy apply. In your will you can do the dirty and not give reasons. But the law allows anyone who feels badly done to to object and try to get the will overturned. Unless someone can tell me that these new proposals are going to change any of that, I can't see what the argument is about. I await.