The optimal course of action involves conducting a thorough risk-benefit analysis of the enhanced Test Automation Solution (TAS). This analysis will weigh the potential benefits of the improvements against the risks posed by the unresolved performance and usability issues. By evaluating the impact of these factors on the maintenance releases, the test automation engineers can make an informed decision on whether the enhancements offer significant advantages over the previous version, and if they justify the potential risks involved.

References = The ISTQB Test Automation Engineer syllabus emphasizes the importance of risk management in the context of test automation. It suggests that decisions regarding the use of different versions of a TAS should be based on a careful assessment of risks and benefits, considering factors such as the stability of the system, the criticality of the application, and the nature of the changes introduced in the TAS1. This approach ensures that the chosen solution aligns with the project’s goals and quality standards2.