This is an interesting discussion, but have to say I have never experienced all the problems that others seem to have playing full piano keyboard with arranger accompaniment. Both AI full keyboard and full keyboard. For me the difference is small.
Maybe I am just lucky that my playing style fits, maybe I am less hard to please, but I do it every day with no problem and never really modify my playing style at all from playing solo piano or playing with a band. Well that may not be completely true, I probably subconsciously make some adjustments on the fly based on what I am hearing, but then I do that when playing with other musicians or by myself anyway.
What I don't do is get concerned about what the arranger is technically interpreting ie the name it is giving to the chords I am forming over both hands. I only listen to the overall sound.
And yes you can use 'backing tracks', in fact you don't even need an arranger to do that. But to some extent that takes away some of the point of an arranger where one of the main assets is the ability to sit down, pick a style and just play live with accompaniment.
I don't make recordings of my playing very often, but I wanted to post an example and found this old recording from several years ago made with my old 3k. Its not great, but I can assure you that its not something I spent time on getting perfect, just a song in my head I sat down and played like I do almost every day in my normal style with no change to how I would play it on solo piano. In fact I changed to CVP because I was playing this way most of the time, and now I get a bit better piano sound and feel from the CVP. I might get around to making a recording or two on that some time, so people can hear the piano sounds, and have sat down several times with that intention. But every time I sit down at the instrument, I start playing, and before I know it, have been there for a while and ran out of time!
When I first got the arranger I used to mess around with style editing, voice editing and all sorts, but now I just think of a song, pick a style and tempo, then play. Some people get a lot of fun from playing around with the technology and everything it can do, some people just want to sit and play with minimum preparation. I am firmly in the latter camp nowadays, and about the most I do in modifying styes is to cut out superfluous parts and keep them simple. And it works well for me.
This recording its not studio quality or a great performance but it works well enough for my own enjoyment, and it demonstrates how the arranger (3K) does OK at following. I certainly don't notice it missing or playing lots of obviously wrong chords. By and large it is doing what I want it to do. I used to love playing with other musicians, and now I really hardly get a chance to do that, and the arranger is the substitute. Truthfully, I have played with many musicians who were not as solid as the arranger.
Sorry, for the very long post, but I find this area of discussion interesting.
https://app.box.com/s/3uyg0i1qnu3drt96uqyvcm08rm7ioe1oMike