Very well put! This is a shortcoming that even great clients suffer from. This is not only the case with Primal, but also with FreeFrom. Unfortunately, my private key has been quite promiscuous and I run risks like this by putting my key directly there. What I can tell you is, since you have a virgin private key, stay with Amethyst and be happy until Primal becomes compatible with Amber. After all, Amethyst is also excellent and, I can say, superior in most aspects, losing only in the UI and, in some points, in the UX.