I’m not rushing into putting levers on the Dauphine, maybe a couple of months as long as it stays stable, but I am enjoying playing the harp very much, it has a very pleasant sound, look and feel.
Don’t forget, you can play ambiguous chords (1st and 5th only, leaving the major/minor issue open).
Looking at some Sylvia Woods books, I find a surprising number of pieces in the key of C with no accidentals. I have to assume that this was a deliberate choice, geared to the leverless.