This is what we are looking at at one of my clients. A2A clients (Slack, Google Meet, considering email) to A2A Orchestrator server (in-house, might be open-sourced) with specialized subagents for e.g. GitHub issue creation following a specific teams patterns and conventions, hooked up to company-wide MCP gateway with federated OIDC trust for passthrough auth (https://www.gatana.ai)

Works pretty well so far. Biggest issue i foresee for success is user UX for average employee, and actually useful use-cases.