Re: D'deridex-class Warbird Maneuverability
Federation starships have "tail pipes" because they usually power the impulse drive with fusion reactors, those will emit hot gasses and heat which you have to get rid off hence the impulse exhaust we all know.
Romulans might not power the impulse drive with fusion reactors and thus not have the need for a red/blue hot glowing tail pipe.
"Sword is personal, brings slicing to a man, you getta that personal feedback, nuclear weapons?.. Meh, goes off big bang and you don't get any feeling.."