Well, I think you still wont get a real feel from the wreckage, about the true size either, as it is in bits, and can never give anyone the same feel again from when it was still afloat.
Plus, you can only see a certain spot of the wreck at the time.. it's picth black darkness at those depths, you can only see about as much as you see in the footage, anyway. Sure up close you can better judge the size.. but you'll not feel the size of her as a whole, I think.
You just have to train your imagination a bit I reckon.. cause walking around on her in Shipsim, is pretty much one of the best ways to get a feel for scale, from a human's eyepoint. Where else can you find a better virtual titanic to walk around on? The real thing is gone, models are all that could give you a feeling of her being in one piece.
Get a multi-monitor setup, turn down the lights, and sit close to the screen, and get a track-IR.. that's cheaper than a dive to the wreckage.. hehe
Fred