Is your feature request related to a problem? Please describe.
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Open Match exposes metrics via Grafana/Prometheus on the performance of Open Match core functionality but many folks would find metrics on the behavior of the player population beneficial as well. There are several issues (#683 & #1312 ) are examples of this ask. Adding these (by default) on an evolving dashboard would be helpful to many.

Describe the solution you'd like
A clear and concise description of what you want to happen.
New metrics added to Open Match and new dashboard created to accompany it. A rolling update of new metrics on either matchmaking (player, profile, etc.) and matchmaker (matches made, memory usage, etc.) added on a steady basis. Issue can be reopened should new metrics be requested.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.
The stats service (#683) and its design was considered but leveraging the metrics and dashboards right now would be useful. Should a new feature be needed based on the added metrics, both the stats service issue and a new feature request should be opened.

Additional context
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