Some principles thinking in the need to produce a presentation others can translate / update / extend:
- Less text = easier to translate.
- Some numbers are good: technical audience likes them; no L10n hassle.
- Too many numbers are bad: difficult to keep up with updates.
- Links are good: there is always a wiki page with more info.
- Pictures are good: we have plenty & shareable in Commons.
- Diagrams are good: publishing the sources to update or derive new ones.
- Very personal artwork is bad: difficult to evolve when the author is gone.