Overpolishing
Some stories are best served raw. The other day, a client pitches a wonderful startup idea to me. The company solves two broken issues (sorry for the cryptical language), and has a solution that changes something that has not been changed since the 1950s.
During the design process I felt somehow that we made it too polished, adding too many "and also, and also, and also" points. It is the full story, the full picture, but the additions kill the energy of the pitch. I think we should go back to the raw version and accept that in a 20 minute pitch we do not have time to cover everything.
Art: Vertumnus, a portrait depicting Rudolf II, Holy Roman Emperor painted as Vertumnus, the Roman God of the seasons, c. 1590