Another cool idea could be highlighting certain words or phrases.
Whether it is the entire post or just the word/phrase. It could be quite nice to have especially if things start picking up. One can have their name highlighted so it is easier to see if they are being mentioned.
I agree.
I think this list of words/phrases should be defined per character under the Character Settings page (you get to it by clicking the cog-icon in the Character Select page).
I would also like this list of words to trigger the “Mentioned” notification.
Initially, the feature might not retroactively scan through the chat log to mark all previously mentions if you add a new word, but only mark the words in new events. Because that is easiest to implement 
Best regards,
Accipiter