Tropical cyclones (TCs), like hurricanes and typhoons, form from clusters of thunderstorms called 'seeds.' Not all seeds become storms, and predicting which ones will is a key scientific challenge. Recent research has identified a new way to describe the shape of these seeds, called 'structural compactness' (Cv), which helps explain why some seeds survive and grow into TCs while others do not. Our study shows that seeds with a more compact structure are more likely to develop into TCs. Using data from the past 40 years, we find that TC seeds have become more compact, and those structurally less compact seeds are less persistent over time. We also find that more compact seeds tend to have stronger rising motion and inflow, which are signs of more intense storm development. To understand how this may change in the future, we analyzed high-resolution climate simulations under different global warming scenarios. Comparing these simulations to past trends helps us better understand how TC formation might change with climate. This work offers new insight into how the structure of TC seeds affects storm development and how that process may evolve in a warming world.