You have to be consistent in how you present yourself -- to the point where you don't mind being "guilty of repeating yourself." If you abandon the consistency, people will get confused and the perception you are trying to change will get muddied by conflicting evidence that you are just the same as you were.
What is the optimal way to use your money? The answer to that will likely change over time, encouraging effective donors to keep posing - and answering -- questions. But you shouldn't worry. It's like a kind of philanthropy-yoga: regularly asking deep questions about giving helps donors stay flexible as well as strategic.