So then you don't believe that a person/soul who has done bad stuff can ever change? Because that is what the pruning metaphor means to me. Basically when we leave this life, we go to a realm/conditions where we learn further (that which is actually 'us' leaves the physical body behind and continues to live in another realm, where our experiences 'refine' us (if that makes sense)

No, I don't.  What makes this any different to 'reincarnation'?  How could they 'refine' themselves without coming back as someone else - something that my 'one soul, one individual' understanding rules out?