I have exaclty same question and wanna hear the “long answer” 
I have 3 macs in my home and 2 pcs, and I really don’t like to install and setup one by one.
Much better if we can just create user/login and access it like a normal server. I understand WD are trying to create something new, but give us the chance to choose what we think is the better option.
Second, I tried the transfer speeds mounting the “guest” TimeMachineBackup (afp) and it is about 90MB/s write and 100MB/s read, against 35MB/s write and 80MB/s read using the “Cloud” volume (KDDFUSE), and it needs the WD app to be mounted. It’s really not practical or secure, because WD can stops to support it in the future and my files will be inaccessible.
To me it makes the WD Cloud option useless, so I will only be able to use it as a guest unsecured LAN hard drive.
Please WD, give us the option to choose and access our files without your software and with the best performance!
