I’d be cautious about expecting one adviser to be “accountable” for every stage. Several parties may control different tasks, so a single contact cannot necessarily guarantee every deadline. What they can provide is a clear trail showing what was requested, from whom, when it is due and what...
My practical next step would be one email with numbered questions, not a phone discussion: fee basis; exact role for each party; named contact; confidentiality boundaries; evidence of buyer qualification; how counteroffers are recorded; what happens to marketing while negotiations continue; and...