Legally they had been served, so there was nothing they could do about it.
Somehow I doubt this.
Maybe it’s true but legally I know in California you are required to do your briefs in 12 point font. While that’s briefs, I would imagine evidence would be under the same banner. It definitely WOULD be illegal to do it in 1 pt font or intentionally making it unreadable. I would imagine if the other side wanted to make it an issue they could back to the judge and he’s probably have it out with you.
Maybe the lawyers wisely replaced your malicious compliance with correct sized print with out telling you, maybe the other side didn’t care.