This sounds really cool! I'd like to join, but if I can talk about the armor. I get why we you would want us to be uniformal, but the armor would be a (I'd even say big) part of our character customization. There is only Three classes from what I can tell and I assume the Weaponry will be quite Basic as well. I can see you're being cautious overall especially the post you talking about players trying to outplay you with . Maybe a little more freedom with Character Customization, might not be a bad thing if you can set broad standard?

On the armor, meh. I mean even IT was designed to be a WIP (2012 Destiny Concept art). To me it look too ceremonial. Unless that is the look you were going for, but from what I gathered we're more of a Space SWAT. My suggestions:
[hider=Armor]
[img]https://i.pinimg.com/736x/c6/b3/d3/c6b3d325803bfb8b20dc539da145024c--robot-design-game-design.jpg[/img]
[img]https://pre00.deviantart.net/ab9b/th/pre/i/2015/030/d/d/powerranger_by_sttheo-d7hp0oj.jpg[/img]
[img]https://orig00.deviantart.net/f920/f/2017/274/b/1/captain_of_the_9th_by_sttheo-danq2ak.gif[/img]
[/hider]

On the Emblem it does seem a little too Military/Paramilitary. Here is a suggestion of an Image:
[hider=Emblem]

[img]https://vignette.wikia.nocookie.net/warhammer40k/images/f/f1/Adeptus_Terra_Icon.jpg/revision/latest?cb=20140526090516[/img]
[/hider]