I agree with that. I’m personally most comfortable with a dual hechsher, the OU for the reasons you said, and a “heimish” hechsher (not all, some – some are weak and I don’t like to rely on those) for their higher standards.
There is a kosher candy company which uses two brands. When the product is of a higher standard, it carries an OU and one of the better heimishe hechsherim. When the product is of a lower kashrus standard, they package it with a different brand name, carrying an OU and a weaker heimishe hechsher.