You're a Growth Manager overseeing a major app redesign project. You're revamping the project update dashboard to improve visual communication.
Evaluate these proposed changes:
- Change 1: Implement a color-coded system where green represents 'on track', yellow 'at risk', and red 'behind schedule' for each project component.
- Change 2: Create a detailed timeline showing every minor task and subtask in the project, regardless of its current status.
- Change 3: Organize project components hierarchically, with the ability to expand sub-components only when they're off-track or require attention.
- Change 4: Use various shades of blue to differentiate between different project stages, aiming for a cohesive color scheme.
Which changes best align with the principles of effective visual communication in project updates?