Although the word 'different' is used often in English, I'm not aware of it getting frequently misused. I do agree that repeated use of that word, or any other word, in a sentence or paragraph might easily be too repetitive, even if it isn't redundant.
For example, "Different people like driving different cars." It isn't redundant, but it does sound repetitive. It might be better to say, "People have a wide range of preferences in the cars they drive." It's better if its shorter, "People prefer different cars."
I believe in omitting needless words. If a sentence is shorter, and uses active voice verbs instead of the passive voice, the sentence is both shorter and has greater impact. When I write, my first draft is usually too wordy and full of passive voice verbs. I usually edit it, to make it brief and impactful. Sometimes I do that here on AH
.
I like the word 'pleonasm' that you mentioned – the use of more words than are necessary to convey meaning (e.g.
see with one's eyes ), either as a fault of style or for emphasis. That fits right in with
omitting needless words.
A common pleonasm in English, is adding the word 'very' to an adjective. It was meant to add impact, but usually fails at that. Does 'very different' really add anything to 'different'? I can think of one former US president who often abused that word.