Regarding Voriconazole, I have been told by several docs that it's not always indicated. Like oral antibiotics, voriconazole can only treat cells that have been infected. In APBA, it's usually an allergic reaction to the aspergillus growing in the mucus. Some docs however choose to treat with an oral antifungal, which are not without their side effects. My point being that if you don't tolerate voriconazole well, it might not necessarily be an essential treatment.
Also, while high dose steroids are often the standard for ABPA, they have a crapload of side effects (including insulin resistance). Xolair is an alternative treatment to high dose steroid treatment.