"My page rank and traffic is at a high level, I'm afraid to make any drastic design or layout changes. What if my serps are affected?"
This is very concerning. Is google's high wrath really affecting the quality of website content, design, layout, and promotion methods so badly that people won't improve upon their sites because of FEAR?
The unknowns can be scary, I understand. Changing meta tags and descriptions can have an affect on serps but maybe they CAN be negative?? There is a flip side to that coin. Do your due diligence. Study other people tests and follow good practices. I'm not going to get into the right and wrongs of building a website but making changes to your site is not bad. But you must do it right.
How do you guys respond?