The engineer visited the site the other day and said that he was happy with the finish of the slab - he said it had a 'good power float finish to it '.
All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.