There are some... Un-deniable hints that uniforms and their models, haven't quite been given enough love into their design and respected wearer. Lets take a look at some of these uniforms, and expose them.

Here is the NATO uniform.

http://wiki.7thcavalry.us/w/images/thumb/7/7e/Arma3_nato_soldier_uniform.jpg/640px-Arma3_nato_soldier_uniform.jpg

It's not completely terrible, it's just some parts are not modeled correctly.

Here is CSAT Uniform compared with others.

http://i.ytimg.com/vi/mj8E718I7pM/maxresdefault.jpg

http://i.imgur.com/8tYmW8A.gif

Now, you can see the CSAT model is far worse. It looks like the legs are all warped and deformed in other places than the knee, and in unrealistic manner. The NATO Knee-pad, is nothing but a slightly shiny texture, that's also not detailed at all. There's not real knee pad, and nothing holding it in place, it's just textures. This is no good.

Now, here are some examples uniforms from various countries. You can tell the knee-pads and everything are an overall important thing for the look of the entire uniform.

http://previous.presstv.ir/photo/20140120/346608_Colombian-troops.jpg

https://s-media-cache-ak0.pinimg.com/736x/c9/8b/6e/c98b6e108aa5981e98fca20fc729e814.jpg

You can see the level of detail in the uniforms in soem other titles, like BF4

http://vignette3.wikia.nocookie.net/battlefield/images/3/32/Chinese_Engineer.jpg/revision/latest?cb=20130801075038

Or even more recently, in Metal Gear Solid V, which displays a very eye catching level of detail to the uniforms, and gear. It looks believable. When i see the NATO and CSAT uniforms, even sometimes the AAF uniforms, they don't look as believable. Chortles mentioned it was also due to the fact the AAF uniform was made last, thus most recent, and the reason it is more detailed than the NATO and CSAT gear, which were to the first to have been made for the game. But now, the uniforms need some love. They need to be cleaned up, and tweaked to look more believable.

We can also hope a better, higher level of detail, and love is put into the uniforms and gear coming with the South Pacific Expansion. But cleaning all existing gear up to one high level of detail is needed to maintain the balance and look of all factions, and in the end make sure everything looks like actual clothing