"Communication" starts with realizing that you have to meet people where they are, not expect them to adopt your style. You have to have some respect for them.
"Avoid unnecessary adverbs" would be another easy one ("unhelpfully signalling your disdain")
Surely if the OP is trying to help their team to communicate in a corporate environment, then teaching them the shibboleths like "upskill" will be helpful to (as you rightly suggest) meet the readers where they are? The team will be free to use them or not, as they choose. Whereas "banning" those words can only handicap their ability to corporate-cosplay, if that's something they want to do.
If you have respect for your readers, then you use language they can relate to.
Regardless: I suggest you check the sibling thread (https://news.ycombinator.com/item?id=33805016), where we explore more relevant considerations - not just "what group are you masquerading as?", but also "does the use of this jargon result in fuzzy thinking or poor structure independent of the actual words used?" (/u/munificent suggests yes, I suggest that they're often correlated but there's not necessarily a causal link - cutting out those phrases will not _in itself_ result in better-considered, clearer, more-meaningful communication)
Castigating people for word choices that you personally dislike while simultaneously advising them to "not expect them to adopt your style" is hilarious.
Corporate is widely and justifiably condemned. It's not just a personal thing. Even on this thread.
Calling it "hilarious" was definitely the work of a flamer though.