I’m writing to let you all know that after careful consideration, we've decided to reduce our global workforce by approximately 20% or 528 Dropboxers.
Should be replaced with
I’m writing to let you all know that after careful consideration, we've decided to reduce our global workforce by approximately 20% or 528 people.
You should never use your pet names for employees in a layoff announcement. It makes an otherwise serious announcement seem tone-deaf.