While I appreciate what you're saying, I'm not sure your analogy draws accurate parallels. For starters, those bands didn't go dormant for 22 years. Second, with regard to Accept, they were a household name within the Metal community, and Fates Warning was still an up and coming band when they switched vocalists. Neither of those scenarios are akin to FA's. Third, with Accept and Fates Warning, the sound was a big part of each band's identity, be it the signature guitar tone of Accept or the musical complexities of Matheos, Zonder and company. Conversely, Fifth Angel didn't have a unique sound. What made them special was Ted Pilot. Finally, while it's fair to point to bands who successfully changed their singer, let's keep in mind, there's at least an equal number who failed.