On the new player stat screen (The one accessed by clicking your profile on the main menu) selecting a hero you haven't played before will show an inaccurate count for the "Denies" stat. Instead of zero, it will show the the number of "Denies" belonging to the hero you last had selected on the...
The "nag" voice lines the play when a character is separated from their group play too quietly compared to the rest of the voice lines. Tested with a couple different characters (Ivy, Seven, Abrams) so it seems to affect all characters that have these sorts of lines.
Yeah, that's how I found it too; just by clicking on one of the links to view the changelog on the main menu. I think there's also a link to it on the Discord, but nothing in-game specifically says "Visit the forums here: " or anything.
The prompt in-game that tells you how to use your melee attack doesn't show the correct key. For example, I have the melee key bound to "Q" but the prompt reads "Press [-] to use your melee attack."
The attached screenshots show the prompt as it appears in-game and what the key is currently set...