Users should be able to find what they need quickly and easily. If there are too many complicated buttons, users may have difficulty taking action, leading to decreased usability. To improve the user experience, the buttons should not vary too much in color and size.
Too much information on one page, users may have trouble finding what they need, especially when scrolling on mobile. In the case of graphs, it can be difficult to read if they are cut off during scrolling. Instead, it is better to break up the information and present it in a step-by-step.