I don't have a problem with different init managers. In fact, TrueOS has just deployed OpenRC as an init manager. My problem with systemd is mission creep. Statements like "sudo is a broken concept. We're going to rewrite it for you!" and "we want to own everything between the kernel and the application layer" shows me that they don't want to have Unix (or Linux as it stands) but they want to recreate it in their own image.
No, it is more of a clone. Back when Linus started writing it it was because there were only commercial Unixes (and Minix). Commercial Unixes like SunOS/Solaris, HP-UX, AIX, etc, were thousands of dollars, and the hardware to run them on (also proprietary) were in the 5-to-6 figure cost range. Linus decided to write a clone, similar to the relationship between PCDOS and MSDOS...Actually, a better analogy would probably be MSDOS and FreeDOS.
And, last I knew, it was not fully viable as an OS, more of a proof of concept. Besides, one of the original complaints about BSD was that it was a niche operating system compared to Linux. It is far less niche than openDarwin. Just sayin'.