I realize I do not go to the Barcarolle often anymore, and I don't know why. I have never played it...this I know why; it's because I'm terrified of it!
I love the Steinway's bass...that first note...adore those notes from that instrument, but I've noticed while the D's are able to project a very direct sound and allow for a wide range of moods and colors, they often times have a low ceiling on their peak dynamics...power is not their greatest asset. I hear such a thing here, and I wonder; did this effect you when you were dealing with the instrument?
Laying that aside, this is surely one of the most brilliant and beautifully played Barcarolles I've ever heard. Bravo! This is a master performance, and I will long keep it with me.
This is one of those masterworks that you could keep in your repertoire for a lifetime, ever gaining new insights from it through the years.
You ask what listeners might do differently, and at the risk of being presumptuous I'll offer a few thoughts.
I love your dynamic control, and wonder if you have tried bars 28 & 29 with the dynamics as marked? Almost all playings I hear follow somewhat what you have done, each bar starting gently and building all the way through in intensity. It seems to me that with the dynamics as marked we can feel a boat on the wave (or the wave itself) building quite strongly but failing to crest fullyand move on. I think of a big intake of breath ( cresc. and accent) and a surprisingly gentle exhale, (the dim. mark). When the same bars reappear with the octave bass (88,89) they aren't marked with a hairpin down. This time they are more certainly part of a great oceanic building to climax.
In the next theme you achieve a mysterious feeling while preserving the steady rythm of the inner voice and bass, and this is very effective. To me, this might be a hair piu piu mosso, particularly in the forte sections following the long trills. Again, I think of things always seeming to build- to become more excitato as the sea enters the sailor's blood.
From bar 103 on, I think of things being more agitato, but I'm not sure I should have listened to your recording, since it's making me doubt my reading!
...wow, it's been a while...This is from a recent recital on a NY Steinway D. Comments and thoughts are SO MUCH appreciated ^^[EDIT:So I was very happy with how I performed it...Except upon hearing the recording...well I'm not sure if that's what I really wanted...Maybe one day I will know what I really want from it...]