One critical feature that seems to be missing in Stackify is the ability to see a holistic view of a given request, either through distributed tracing (seeing a given request in its journey through various service dependencies and dependencies of dependencies, etc.) or being able to click through from a trace in one application to the dependent trace in another instrumented application. As I understand it, there are some standards being developed which use a correlation ID to tie requests together.
A dependency graph would be awesome. I'm looking forward to seeing this feature in action as well.