it is not really Dreamweaver that has evolved... but the web... some years ago major notions like Responsive Web Site, Web Applications, Client Side Handling, Strong imposition of standards... and so on... were not so present and imperative in the development processes as it is now.
So DW try to bring solutions and tools to that new workflow... there is still gaps to fill, but that's on the road and radars.
you don't really need to know code to develop web site using DW, but it is strongly recommended to have a good foundation in HTML structure and to understand the processes to implement support of responsive aspect of websites, and especially to build a real content strategy
without those points the evolution and the cohesion of your contents will not be true in time.
as Ben explains to you, Muse is a tool specially adapted to the designers who can not, or do not wish, to make this step to learn the basics of the standards. But that doesn't mean that DW is not accessible and as Nancy and Kratika show you, you can use starting templates to helps you to ride the first steps.
In any case, please do not hesitate to post on this forum to get help and make it easy for you