I think having the gallery viewable without an account would be valuable.

Oh yes for sure. Checkout https://www.klavis.ai/mcp-servers. You do not need to sign up. But you cannot see the auth flow for obvious reasons.

The lack of enterprise Microsoft services is really discouraging.

We are aware of this and working on it now. We are actually code complete on Microsoft Teams and Outlook. We will definitely launch it within the next week or so.