I support having the title back at the top. When I get a roleplay of a duke approaching mine, I want to know who the hell this stranger is to react appropriately, without needing to open a new tab.
This way, it's clearly not a signature imo, but equally as informative. Perhaps have the whole title in parenthesis just to further insist that it isn't a signature or a letter header. Also, I'd favor replacing the term "Roleplay" with "Narrative", as even orders are a form of roleplaying and this might be causing some confusion with non-native english speakers.