I live in TX, but I wasn't the one who bought Fran's Prelude. Hopefully this buyer's not a deadbeat, and it went to a good home.

I actually play rubato like this the majority of the time. I'm definitely not a pianist. Because I don't play full-fingered chords with my LH, I rely on at least one accompaniment track to provide a "pad" sound, or some kind of chordal accompaniment (i.e., instead of the Lower voice.) If the song doesn't require Bass Inversion (i.e., no slash chords), then I can't really use the Manual Bass feature either. So in such cases I rely on a modified accompaniment bass track to go with the chords. No drums, and no really rhythmic beat.

I find playing this way to be very "freeing" and authentic. It's very forgiving with a singer, too. It's great for practicing, because there's not a harsh penalty for late notes/chords. If the sound doesn't sustain long between chords, it encourages development of quick, smooth chord changes. Of course this is easier to do when you can play full major chords with one finger! ;-P

An arranger is the only type of keyboard I know of that can do this sort of thing. Ok, maybe a chord organ too. [When you're bored someday, google the Hammond S-6, and tell me that it's not an arranger!] But the best of those were made over 50 years ago. I'm not a pro and I have nothing to prove; I make music because it makes me happy, and I'm very content with an arranger as my primary tool.