The WA is a transition agreement. It is designed to let the UK leave in an organized way, so that the discussion about the future relationship can then start. All discussions about Canada ++, Norway+, take place afterwards as they require lengthy debate and painful compromises for British politicians on all sides. The EU has been adamant about this sequencing right from the very beginning. It is silly to assume it will roll over and play dead now. Britain is going to have to confront the lies and wishful thinking that continue even after 2.5 years of Brexit "debate". A referendum might help at the end of this process, but certainly not at the beginning. Nobody can even agree on what the question(s) would be.