Hey Karl-WE,
All your points are valid. However, they are individual pain points of the existing tools (mostly, Admin Center.) They do not justify the need for a separate tool to cover those gaps. They should really be addressed within the existing WAC functionality, or by adding missing pieces (e.g. Telemetry, or Ping.)
And if you see discrepancies—such as in the list of updates being found, etc.—please note that we're working on eliminating them. I.e. in ideal world, there should be all the same updates detected, regardless of the tool you're being using.
That said, I would highly encourage you to raise those pain points in discussions with the WAC team. E.g. what stops that 80-server customer from using WAC and/or other remote management tools? Why you are so convinced SConfig is ideal for them?
One thing I can tell you—stay tuned for SConfig on Windows 10 🙂 It's not our primary goal (due to the reasons I explained above), but we have some work planned which might make this possible, too.