This has got to be one of the most silly OPs I have read today. Even more so than all the "reinstate skimmer" threads and that one about how wing missions were an exploit for new players.
You are distilling the entirety of people's positions on this game (and on the entire world at large) down to simply a knee-jerk reaction to change. That has got to be the most narrow way of viewing things possible.
People aren't against engineers because they hate change. They are against engineers because they hate what they bring to the game. Is this really so hard to grasp? You don't have to agree with them, and if your ideal game is one where every year the devs double or triple to power-level of the gear in game and call it "content" then I understand why you would like engineers and guardian tech. But try to understand that not everyone sees things the same way you do, that some people enjoy different sorts of games and it's not just because they are scared of change, it's because they don't like the change.
Politics is the same way. "Conservative" and "progressive" don't really describe why a person holds their political views, rather it simply descries where their views fall relative to the current political atmosphere. A conservative isn't pro second amendment because they hate change, but because they like gun rights, just like how a progressive isn't against the second amendment because they are obsessed with changing things around, but because they don't value gun rights as much as safety.
Most of the anti-engineer arguments that I have heard include a bit about how engineers could have been added in a more positive fashion. I think I have only seen one person argue that the fundamental change engineers was supposed to bring to the game was bad. The rest have been supportive of the core concept of engineering, but critical of it's implementation.