Like you, I am fuming at what Adobe is doing. So that I do not start using expletives, I will not go into this any further. As Ray has mentioned, the best solution is to use the DMXZone Extension Manager, it is free of charge. Once you have installed the EM, use the EM to install the deprecated server behaviours. This will re-install the panels that you are talking about.
After that, come back to the WA site, click the CC-extension(s) and (using Firefox) open using the new EM. You will get a few warnings. Just ignore these and all is well.
The only problem I have found so far is with Framework Buider. When you want to create a new page, make sure that you have an empty document named with filename that you wish to allocate to the new document, like myFile.php. Then apply Framework Builder and it will place all of the code in the new page, but also create an untitled page (????). Delete the untitled page and continue with the required page.
As soon as Ray has the time, I will put the problem to him.
Any other problems with Dreamweaver? Go to their forum and vent your feelings.