I completely agree, it is simply fueled by greed from the sellers and opportunism from buyers, wrong in every level unless it is genuine renegotiation. It will never become law until we have exchange ready packs and surveys on hand. But currently sales are agreed subject to contract and survey.
Totally agree, a complete waste of time and money! It works both ways of course depending on changable market conditions. The best way to prevent it is to keep everyone communicating at every stage, there has to be an element of trust all round.