What types of changes in skill development are typically easiest to learn and often lead to rapid improvement?

The focus on pre-swing changes is warranted because they involve adjustments that can lead to significant improvements without the complexities that come with changes to the swing itself. Pre-swing changes typically address aspects such as grip, stance, and posture—elements that set the foundation for a player's overall performance.

These changes are often easier for players to grasp because they can be made relatively quickly and do not require the extensive practice needed for full swing modifications. By making pre-swing adjustments, golfers can quickly see the impact on their performance, which fosters a sense of progress and motivation to continue improving.

In contrast, full swing changes usually entail a more complex overhaul of mechanics that can take longer to establish and see results. Short game changes may also be valuable but often require nuanced skill and feel, while putt alignment changes, although beneficial, may only affect one aspect of a player's overall performance. Thus, when considering ease of implementation and rapid improvement potential, pre-swing changes stand out as the most effective approach for many players.