Short Anwser – No ,I'm not considering connman at the moment. I'd only need it for a wired connection.
Long Answer – As of today, I've not moved from systemd 215-18 to systemd 220 due to the ceni bug, which may get a fix soon (?). I've just reverted to Network Manager, but this seemed to introduce added latency to web surfing. Assuming this problem was real, and not just my imagination, I decided to go back to ceni and wait. But now ceni doesn't want to work! WTF! No hardware devices are displayed on the first ceni screen. My workaround for now was to configure /etc/network/interfaces but hand,then just put “ifup eth0” in /etc/rc.local and let systemd's rc-local.service do to its thing so the connection is up before login to desktop.