Question

Hello Rabbi, I wanted to ask what the Rabbi’s view is regarding Ashkenazic pronunciation in prayer—whether there is any value in preserving it. And what is the law for a Sephardi who prays among Ashkenazim: is there any reason for him to follow their pronunciation, or should he act in accordance with Rabbi Ovadia Yosef and continue with his own custom, and we are not concerned here with "do not form separate factions"?