I am quoting something that was posted in the Mimesis forums because after making this post the topic was locked and I did not have a chance to reply.
jelle2503 wrote:thats not all there is too it. its an uberleet skin PLUS the things headshot has added just to make this one stand out a bit more. the gameplay on this is marvelous.
btw if you're not liking this don't download it. neither will you like the valley by Greennc, but thats also only a skin so ya idk whud you on about.
oh and if you ask me, citadel is a nice (new) map, but there's nothin big to it. it's only got visual appeal, but if you try and look deeper into a map , in stead of being in love with visual appeals like most people do, you can easily find this map much better.. but lack of modding knowledge withholds that.
I won't disagree that it is a good skin and the gameplay is balanced, but thats all it is. 
Playing as grunts doesn't make this map better.  In my opinion it makes the map worse.  You are not as tall and you have to change your grenade timing, and it doesn't let you use the warthog.
The only other thing that is added is sounds, a fuel rod gun, and a Shadow.  The Shadow is useless.  I would much rather use warthogs/ghosts to transport the team because you get more turrets and everybody isnt bunched together getting easy multiple kills.  
The fuel rod gun is nothing new, it has been in many maps before.  As for the other weapons, all they have is new skins.  Sure the needler and plasma rifle have new contrails, but is that really a reason to play this map?  
And the sounds....just because the grunt makes a noise when he dies doesn't make me want to play this map.  I could care less if it does or doesn't.
I wasn't criticizing the map, all I said was "No offense, I don't like it", and I actually complimented the work he put into it.  I didn't even say it shouldn't be put on Mimesis.  Then you go off trying to show you have an authority over me telling me not to play it, (which is obviously won't), and then insulting me by saying that I "lack modding knowledge" and that I only care about the visual aspect, which is contradicting yourself because you state that one of the best parts of this is the skin. 
And you are right, I don't like The Valley,Cassiopeia, Moon Stronghold, Outbreak, Sunnison, etc. because they arent anything new.  At least Dead in the Water had new weapons.  I already have a Zanzibar, and I use Mimesis for maps that are new.