I've just tried ACP and really like it. Agents will be stronger with Toad's power. I don't think much about creating my own TUI anymore (at least for first releases).
If you have existed Pydantic AI agent or prebuilt ACP agent, you can pack it as Pydantic AI model. After that, you will have a super model that handles a lot of capabilities. At this point, main agent stays as orchestrator.