aha! Got it! In addition to those two links in my initial post, getting OpenVPN to start and connect at CentOS 7 system start was nigh impossible, but for this!
https://ask.fedoraproject.org/en/question/23085/how-to-start-openvpn-service-at-boot-time/
"It seems this is a known bug/limitation in the design of the Systemd framework in combination with OpenVPN. "
Once again, without derailing this topic, thanks for nothing Systemd! And, I've figured it out. Whew! Hope these links are helpful to someone else.