Skipping project retrospectives can have negative impacts on the project performance, quality, and team morale. Project retrospectives are important for identifying and analyzing the strengths, weaknesses, opportunities, and threats of the project, and for implementing corrective and preventive actions to improve the project outcomes and processes. By reducing the time for preparation and discussion, the project manager could cause the following issues:

A lot of discussions that yield no results or possibly too many results: Without proper preparation, the project manager and the team may not have a clear agenda, objectives, and scope for the retrospective. This could lead to unfocused, irrelevant, or redundant discussions that do not produce any meaningful insights or action items. Alternatively, the project manager and the team may try to cover too many topics or issues in a short time, resulting in superficial, incomplete, or overwhelming analysis and recommendations.

A focus on the negative and a disinterest in further improvements: Without sufficient time for discussion, the project manager and the team may not be able to explore the root causes, impacts, and solutions of the project problems in depth. This could lead to a negative and blame-oriented attitude, where the team members only focus on the failures and faults of the project, and do not appreciate the successes and achievements. This could also lead to a loss of interest and motivation for further improvements, as the team members may feel that the retrospective is a waste of time, or that the project issues are too complex or difficult to resolve.