Too many intermissions, there should only be one. You run the risk of people leaving during the intermission if you have too many, it also slows the concert down too much and people will become generally restless. This concert seems quite long have you timed how long it would take?Why don't you start the concert with Bach? I do not see the piece connection between Brahms Debussy and Bach. I have been critiqued for playing WTC in concert when I first started off doing concerts, but I still now and then play them but people generally people respond better to non WTC!I find the Schubert Piano Sonata excessively boring unless you can play it with something special but even the pros make me fall asleep here. Schubert is just so difficult to pull off well and for a non piano minded audience it will bore them to tears no matter how you play it. Must you do the entire Sonata? Can mix it with other Schubert perhaps. The Liszt although a showy piece will not be enough to make people care if they have been lulled to sleep with the Schubert.Chopin/Brahms is ok mix.Piano Concerto Saint-Saëns??? Have you got an orchestra to back you here or 2nd piano? Personally I don't like this played with 2nd piano.
You have to understand that people in this generation have an attention span of a monkey, only being able to comprehend 20 minutes of classical music at one time.
So what if I don't start off with the WTC? What's wrong with breaking habit? That's why classical music today is suffering, orchestras going into debt, record companies shutting down, etc. You have to have a change of routine, and I, personally, think that the Brahms has a good opening, following a tranquil Debussy.
Jesus man, look deeper into each piece you play other than the notes, and at least try to understand it. Stop thinking like a pianist for once, but like a musician, and even more so an ARTIST.
Honestly, in my eyes, anything goes, just make it work.