Going to try and keep this short.
Guns - Unbalanced, not worth their price, most has the same exact stats, guns release for every holiday, no sound in certain guns, same gani for every gun.
Hats - It's excessive, a lot of buildings on Zone are filled with hats. Maybe focus on more bigger projects and compile those hats in one to two store.
Tileset - Someone already stated this, but this is important as it creates the environment around the players. A bit too much blue and gray. It should focus on space theme rather than the whole "skyworld" them.
Staff - I am quite surprised to say this but staff team are actually pretty decent, aside from that, I don't see much work being done and updated, but then again they might be working on something big who knows.
PvP - Needs improvement in basing, showdown and spar. There's virtually no prize or non that are worth the player's time. Try to create something that players will strive and work towards for.
Classes (should be changed to perks) - needs to do more than your occassional "walk faster" or "shoot faster".
Classes (Factions) - Somewhat similar to Ol West, e.g. Police, Space Bandits, etc. Certain faction can access certain buildings and do factions events etc. I'll make a separate thread for this.
There's a lot more but I'll leave it here for now.