azi:
To each their own. It is a sign of the level that Kashrus your community wants that the Rav who wanted the dress code was tossed. That is the level they want (which is perfectly acceptable) while Rav Landau & the Eidah want a “higher standard” (which is also good). The Rav who got tossed felt the standards were too low and was willing to lose prestige (as he is no longer part of the “board” or on salary of the Hechsher) to stand for what he feels is correct? Good for him.
A similar situation would be with something like Bishul Yisroel Tuna. If the Hechser decides to allow starkist, and one Rav says no, and is willing to resign for it, good for him. He can always put out a list of those stores that do not use Starkist (if he wants). If the Hechsher does not allow it, and one rav wants to start a lower quality Hechsher, also good for him. Compitition and multiple options is only a good thing.
What is unacceptable is to not eat the food of the place that you give a Hechsher on. Either you hold of it or not.