Hi Victoria 2, of course Cunard cannot just appeal to "history buffs" and "ship nuts". Anybody is welcome to enjoy their experience, like yourself. However, I would suggest much of what you enjoy about they has been carried over from the past. If you don't need that, you could choose Celebrity, Princess, NCL or RCI etc. (By the way, P&O's Arcadia is the same ship as Queen Victoria).
For me TA' are what Cunard do best and the QM2 is easily their best ship. You are welcome to disagree.
What you have said, in my humble opinion, is a bit like saying "I've just purchased a vintage Rolls Royce, but I have no interest in historic cars". For me they go hand in hand.