You know that thing where if you make a security review feature obnoxious, after some time people will just accept everything without even looking? Yeah...
Yes, that's what I used to do when I ran Arch. It's usually easy. The PKGBUILD is usually small to begin with and the difference for a new version should normally be something like the URL and the version number and not much else, so you can just diff it against the old version.
I usually only use AUR to install trusted pre-compiled binary packages, the scripts are very simple and the only thing that should ever change is the url and the sha256
Also paru shows you coloured code syntax if you have `bat` installed, i think.