I understand blockchain immutability, but in your text you are basically asking same question 3 times, and your question is implying that there's a problem with data immutability but you are not telling us what that problem is.
I agree. The word "problem" projects a negative light on the subject. I'll edit my question and use the word "feature" instead.
Answer depends of the definition of your question and this could go in so many ways if i had to guess what you mean.
Yes, you are right. That's what I'm looking for.