OKTrends addresses that to some extent for messages, but not (as far as I've seen) for profiles. Without having tested it with a critic, my expectation would be that the style of writing conveys personality in a relatively subtle way that would come through on the LBL/overview critique. Some specific things would be worth advising against (jokes that fall flat, lack of variety in word choice and sentence structure, etc.) but most would just be a question of taste.

I did consider advising good grammar and spelling, but given the intended audience I didn't feel it was necessary.