One thing that is very noticeable in arranger performances; you rarely hear jazz/exotic/rootless/inverted/revoiced/11th-13th/dim-aug 7-9th/etc. chords. Without these variations and depending on the genre' (but especially jazz), it is hard to make an arranger performance sound either authentic or professional. This is not a knock on the musicianship of the arranger player, but more an acknowledgement of the unpredictability of how a given arranger will respond to being presented with these non-standard chord variations. In some cases, arrangers can be set up to respond a certain way regardless to the 'root', but that feature is pretty much restricted to common/standard fingering (voicing). So......how to get around this. Simple (in some cases ); play the desired chords MANUALLY over a very simple, but otherwise appropiate (and complimentary) arrangement. Sometimes it can be as simple as just adding the 1 or 2 missing notes. The downside is that you may not always get the BASS note(s) you want (provided by the arranger). I'm not sure how the A.I. used in chord recognition in arrangers would or could handle this (which is why playing with live musicians is so much more rewarding and why you probably won't see arrangers used much in the more complex musical forms such as jazz).

Obviously, the above is only my take on it but I would love to hear other opinions on it (but hopefully not from a defensive posture).

chas