I would ask (or not be frightened or anything) for/of an increase in both olanzapine and quetiapine: what you're taking are not therapeutic doses. Considering you take both, I would think 15 mg olanzapine and 300 mg quetiapine for now is really not that high.

I wouldn't take zopiclone and clonazapam at all, but withdrawal/paradoxical symptoms are likely, so maybe start gradually lowering those. Don't just stop taking them, but let the antipsychotics do what zopiclone and clonazapam do now. If quality of sleep is an issue, you might want to take 400 mg quetiapine. In that case, the olanzapine is fine at this relatively low dose.

Great it's going better, but for maybe a few years or longer at the least you really should take rather high doses of antipsychotics. It keeps your brain quite literally from burning up.

No-one will cut open your brain unless an MRI finds something that needs to be removed. That is possible, but don't count on it. Meds are probably gonna be all.