Your dream seems to reflect themes of competence, recognition, and interpersonal dynamics in a work environment. Here are some possible interpretations:

1. Workplace Dynamics: The scenario with Greg and the new coworker may symbolize your feelings about teamwork and collaboration. Greg's struggle with dyslexia and the new coworker's ambition could represent your concerns about fairness and competence in your work relationships. You might feel that your skills and contributions are not fully recognized or appreciated.
2. Self-Doubt and Validation: The fact that you were tasked with writing the signs while Greg presented might indicate a fear of being undermined or questioned in your abilities. You seem to be confident in your skills, but the dream reflects anxiety about how others perceive your work.
3. Communication and Expression: The emphasis on Greg's presentation being flawed could represent your fears about communication in your professional life. It might suggest that you value clear and effective communication, and you may feel frustrated when others do not meet those standards.
4. Advocacy and Support: Your reminder to Greg about his dyslexia highlights your role as an advocate for those who may struggle. This could suggest that you have a strong sense of empathy and a desire to support others, even if it sometimes leads to conflict or discomfort.

Overall, this dream may be prompting you to assess your workplace relationships, your role within your team, and how well you advocate for yourself and others. Consider reflecting on whether you feel your contributions are valued and how you can navigate any tensions with colleagues moving forward.