Q1. From my previous experience, i believe that the Expectant theory & motivation is most influencing model towards change management. As the majority of change is Top down approach from management, it is necessary to delivery a clear message on the change itself and to promote the change towards all staffs by demonstrating the relationship between efforts, performance and rewards. And Pink model is also key factor of success towards change as staff growth and satisfaction would definitely help to achieve change management of a company to sustain in the market.
Q2. There are two levels of motivators that are used to achieve the desired outcome from change. First level is safety needs especially job security. Once this level of need is fulfilled, then the next level of motivators would be esteem needs or self actualisation needs (job satisfaction, achievement, growth, etc.) that all these would help to as it enables the staffs to associate their own growth and satisfaction with the company change mission as well.