Heap recently revamped its line graphs to enhance user experience and data transparency, addressing issues identified through customer feedback and internal usage. The redesign includes several key changes: increasing the target size for easier interaction, reducing tooltip animation duration for smoother transitions, and simplifying the design by removing unnecessary labels. The new graphs use linear interpolation, replacing the potentially misleading monotone cubic smoothing, and introduce a mouseleave interaction to improve tooltip visibility. For multiple line graphs, the redesign resolves overlapping vertices issues by transforming the legend into a semi-transparent tooltip and eliminating vertices to boost performance and clarity. Despite these improvements, challenges remain, such as managing the display of numerous data series without overwhelming users and refining tooltip and legend placement to minimize data obstruction. The article invites feedback and discussions on these design changes and offers a glimpse into Heap's collaborative approach to continuous improvement.