Not the person you replied to, but I'll stress the point that it is not just what you can add that Claude Code doesn't offer, but also what you don't need to add that Claude Code does offer that you don't want.
I dislike many things about Claude Code, but I'll pick subagents as one example. Don't want to use them? Tough luck. (AFAIK, it's been a while since I used CC, maybe it is configurable now or was always and I never discovered that.)
With Pi, I just didn't install an extension for that, which I suspect exists, but I have a choice of never finding out.
This is and has always been trivially configurable. Just put `Task` as a disallowed tool.
You can just put "Never use subagents" in your CLAUDE.md and it will honor it, no?