There is an important distinction to make when we say we want to overcommunicate.
Overcommunication is essential in certain circumstances: change, growth, downsize, new team, new team members, just to mention a few. I actually think that overcommunication is good in general, as we too often have the tendency to assume and take for granted that others know and understand things the same way as we do.
Nonetheless, overcommunication deals with frequency, not with content. It is not necessary to tell more, it is to tell more often.
Sometimes, when reading a presentation, or an e-mail, or a report, it feels like one can almost see the different layers that have been added in the attempt of increasing clarity or including an additional point. At times, it looks like the more bullet points you have, the better.
It does not work.
The more you add to your message, the less it will be understood. Keep it simple, real simple. Make sure anybody who has a superficial knowledge of the matter could get it after reading it once. Read it out loud and listen to how it flows. If you have even a single doubt, start cutting. And if you have no doubts, cut anyway.
I notice that you use plain, simple language, short words and brief sentences. That is the way to write English—it is the modern way and the best way. Stick to it; don’t let fluff and flowers and verbosity creep in. When you catch an adjective, kill it. […] An adjective habit, or a wordy, diffuse, flowery habit, once fastened upon a person, is as hard to get rid of as any other vice.