If styles sound great, then, ideally, the guitar parts shouldn’t be instantly recognizable as “keyboard’s guitars”. So far they do not sound so authentic, so there’s a work to be done.
Also, it’s important how an arranger handle changing chords in “wrong” places. You may notice that at ~4:55 it doesn't sound quite natural, but maybe it’s just this specific case.
The 're-trigger' notes you hear at ~ 1:13, 4:50, 4:55, 4:57, 5:03 and 6:46 has been an issue the PA series have had since the PA50. It has to do with the timing of exactly when you press any of the FILL or BREAK buttons. Press outside of the 'down beat' and guitar, piano (or any percussion) tracks within the Arraner 'retrigger and stand out' as you've clearly pointed out.
In my opinion, the other arranger manufacturers have better algorithms that result in much smoother transitions when using Fills and Breaks irrespective of what point they are pressed during a performance... in other words, their chord recognition and response is more 'forgiving'!