1 If you don't understand why https is a very poor replacement for syslog over a network that may well be unreliable. I will assume your not really familiar with low level hardware and the failure modes. You do not seem to get the overhead and delay of TCP connections in general and thus why it's a poor choice for logging.
2 Well when your billing T&M there is :), point is reboots should occur so infrequently it does not matter.
3 again no advantage.
4 In your opinion it makes things easier. One text file vs a text file in /etc/sysconfig read in from an init script whats the advantage? Frankly it's just a different templates for the same set of variables in configuration management system, no new functionality is being exposed.
5 So I start SSH and SNMP a few seconds later since the monitoring system is checking them on a regular basis? I'm not seeing any advantage for a server, if your running a service your monitoring a service.
6 Work to setup? Maybe if your just getting started. All this stuff is already been baked into config management systems. systemd just means reworking all that into systemd speak with no great advantage.
7 Outside of service upgrades if I have to restart a service it's broken and needs to be fixed, be that by the vendors or rolling our own if necessary. This is not windows if you have to restart it's broken (mind you I have the same opinion of windows services). So pretty much if you need this your fixing the wrong issue.
8 Systemd fails to give an advantage that is the drawback, something that is new that adds nothing useful in an of itself.
Were just going round and round, systemd fails to do anything new and useful for servers. The pressure to migrate comes from the OS vendors with lots of work and debugging required to get in parity with the current state. So it's effort and time without any improvement for a shop that is already competent and utilizing modern tools. I get that it's got a lot of advantages for laptop/desktops it's just not compelling to server admins. It really should have been an option for rhel7 rather than the default, it's a boon to integration consultants for sure.