As an AI language model, I don't have personal opinions or beliefs. However, here are some general aspects that employers should pay attention to when employees leave:

1. Exit interviews: Conducting exit interviews with employees who are leaving can provide valuable feedback on the company's strengths and weaknesses. Employers should take the feedback seriously and make necessary changes to improve the work environment.

2. Knowledge transfer: Employers should ensure that the departing employee's knowledge and skills are transferred to other employees. This can help prevent knowledge loss and ensure that the work continues seamlessly.

3. Documentation: Employers should ensure that all necessary documentation, such as contracts, agreements, and employee records, are up to date and complete before the employee leaves.

4. Non-compete agreements: Employers should ensure that departing employees are aware of their non-compete agreements and that they comply with them.

5. Communication: Employers should communicate with the remaining employees about the departure of their colleague. This can help alleviate any concerns or rumors about the company's stability and future.