I’m sorry to hear you gave up on the caricature..they can be hard and frustrating, especially if you feel you work and work but don’t see progress. I think you’re headed in the right direction with this sculpt. Morgan Freeman is a good choice – nice features available to emphasize. And you’ve accomplished most anatomy and structures well enough. They just need pushing in the right direction to achieve an exaggerated likeness.
Thanks for sharing! And I look forward to seeing the concept art you illustrate.