I would suggest a recap of lesson learned as an opportunity to highlight what caused the strategy to be poorly executed. In this same presentation, I would highlight steps or the strategy you’d like to implement for the next opportunity. If it is hard to get agreement on the entire strategy pick the Top 3 things you’d like to change and see if you can gain buy in for 3 items. Change management sometimes takes time for leadership to understand and “see” the value.
Retention bonuses can also assist in loss of talent. If possible, obtain budget approval as soon as possible during the M&A process.