It was a real strength of the show that even characters who were primarily comic relief (like Badger and Skinny Pete) had levels of depth and realism to them. If Walt jr was portrayed as anything other than an ordinary teenager with a physical disability, it would feel very incongruent with the rest of the series.
I owe this show a rewatch.
I thought the game did a pretty good job of showing cops as a gang just like any other in Night City. Of the two cops you work with, one has a questline about the cops being shitty and negligent, and the other is a just fixer who sends you off to do illegal shit like all the other fixers, independent of the police.
Also the cyberpsycho missions were fun, what with the trying to nonlethally arrest super-powered mentally ill criminals to get them help before the NCPD comes in to straight up murder them.