Well, I'd say concision is not the key - sometimes you should be verbose or something else.
In fact, my tendency is to be far too long-winded, with lots of perhaps-unnecessary parantheticals etc. Ai is often shockingly useful at reining me in and focusing on the issue at hand, as well as removing my worst tendencies towards meanness etc...
Im a good writer, when I want to be. But having Ai review, edit, write drafts etc undoubtedly makes me a better writer/communicator. But only because I'm actively thinking about it all, rather than just saying "respond to this" and then providing copy pasta.
And because most ai's are not concise we blame ai's for faults we don't like in humans either: being longwinding