Vorker turns a discovery call into a scoped proposal, writes the monthly retainer report and chases the final invoice before launch. You approve everything.

No. Every proposal, email, invoice, report and post is prepared and then waits for you. You can read it, edit it, reject it, or approve it and schedule it for later. Approve the payment reminder now and let it go out on Monday morning.
Good enough that you are editing rather than starting from a blank document. It works from the real transcript, so the phases, assumptions and the things the client said they did not need are actually in there. The estimate and the fee are still yours to set.
No. Vorker is the layer across your calls, email, calendar and accounting that produces the documents and the follow-ups. Keep planning sprints where you plan them. Tell Vorker what shipped, or forward the export, and it writes the report from that.
Yes. Upload or forward the export, or just tell it what you did this month, and it drafts the client-facing report from that. It can read spreadsheets, PDFs and documents you send it, and run the same job on a schedule every month.
That is one of the better uses. It can research a prospect and their current site, find and enrich companies matching your niche, draft the outreach, build the pitch deck, and keep a recurring nudge going so outreach does not stop the moment you get busy delivering.
Small studios get the most out of it, because there is no account manager to hand the admin to. Vorker is built for businesses of one to ten people. Most agencies start with one thing, usually call to proposal or the retainer reports, and add more once they trust it.