Benzos don't do shit for psychosis in my experience. The right antipsychotic, when dosed properly, should not leave you feeling like shit; it should act as an emotional "dampener" of sorts (and both as a result of that and through other mechanisms, a sleep facilitator), allowing you to distance yourself from otherwise overwhelming emotions and commit to more long-term solutions (such as therapy, and possibly keeping a lower maintenance or PRN dose of AP to help you not end up overwhelmed).
I know that even now there are times I feel a huge relief when I take a nightly dose of Seroquel.
The layman's belief is that "dopamine == pleasure", but as with many similar ideas in neuropsychology, that's a major oversimplication. Dopamine isn't all good, much like any neurotransmitter; it plays a role in reward (or more precisely, the anticipation of reward), but equally in addictive tendencies (completely independantly from any subjective feeling of pleasure), compulsive behaviour, psychotic symptoms (e.g. hallucinations, false convictions, etc), and even in provoking some very negative emotions such as anxiety and feelings of persecution.
It's certainly not solely responsible for any of these effects, but in the same way, it's far from uniquely responsible for feelings of pleasure. You only need to look at the drugs the are reputed for producing the most intense, often indescribable euphoria (heroin and MDMA are the big two that come the mind, with meth possibly a moderate-to-distant third for some); none of them work solely on dopamine, and instead have either direct or downstream effects on a multitude of neurotransmitter networks (not limited to monoamine systems).
It's much that same as the similarly dogmatically held belief that "low 5-HT == depression", despite a large volume of evidence showing that the reality isn't that simple.