When you deliver a message, you need to make it as clear as possible. It's impossible to over-simplify it. There's an old set of rules about how to make your communications as clear as possible -
1. Emphasise what is important
2. De-emphasise what is not important
3. Remove what is irrelevant
Easier said than done, perhaps. But it's a good discipline to review your speeches in the light of those rules. You may get a shock the first time you do it. And if you think "everything is important", you'll never get a message across.
Don't forget that the clearest messages are also concise. In other words, as long as necessary, but as short as possible. I hope that's clear.