Thank you very much RBI - you're a reliable source of info.
Having a verbal offer pulled after a month is unfortunate, however that seems far easier to recover from than the ones I saw lost after 1-2 years with only 2-5 months before the NLI date. Fortunately, they ended up playing at other D1 schools, although I don't know whether the deals were as good.
A common reason given for decommits is "grades" - indicating they won't get through admissions. I suspect a portion of those are because the coach lost interest in them and chose not to lobby on their behalf. Any insights on this?
To expand on your COMMUNICATE advice, I recommend DD's develop/maintain their relationship with the staff and trust their instincts if they sense a change in attitude towards them.