you know it is already done, so it's possible. Look at the geonosian blunderbuss for reference.
2.
changing or taking away the red flashes when a unit is hurt (could it be a "fx" or "tga" file)
wanted to disable it, too. but never found something like that in the assets.
3.
When near death, a loss of color happens (everything starts to go black and white)
you can change HUD bitmap colors depending on the level of health, but i don't think you can do that for the whole screen.
4.
Health regains slowly with out a healing ring effect works for HUMAN PLAYERS ONLY.
health regains for players should go through lua scripting (the fakeconsole can it, so you should do it in the scripts, too). the effect can be removed. just look in the FAQ how to disable the guardian/war hero effect. it goes the same way. But it'd remove the effect for all kind of health regains. (items, droids, and the constant human regain)
8.
Zooming for first person actually "zooms" rather then shows a GUI (the blue on-screen targeting image)
i don't know what you mean
9.
Quick motion blur (when the mouse is moved quickly all odfs would leave a (very small) bit of a blur trail)
i just know the running blur. see 26
12.
Changing the on screen GUIs (health bar, aiming circle)
FAQ -> How to fully customize the HUD.
13.
Making health into a number.
you can get the health number to change the colour. maybe you can print this number, too. (see 12.)
15.
Better shadow quality , maybe even dual light shadowing.
more detailed shadow volumes. Not sure if there is a limit, but most models just use the jettrooper sv. you can duplicate the high res volume, remove the textures and than use the polygon reduce function to lower the polygons but have the same shape. (just play around with the settings)
19.
A better and more modern running and walking animation.
FAQ -> How to munge a new animation set
20.
In first person the two handed rifle weapon is turned so its "out" a little more. this would also make the units hands be seen a little more visable
not sure what you mean but first person animation works. FAQ -> Implementing Custom First Person Animations
23.
In first person when running with a two handed rifle you can see it "wag" or "sway" back and forth while holding it so you would see it from the side (like most modern shooter games)
I don't know the pose you mean, but it's the same as 20. Just notice you cannot make a different animation for walking and runnig. these are the same but slower/faster played.
25.
When running with a pistol in first person the pistol becomes held in an upward position (like in battlefield 4)
see 23. or 20.
26.
Can I change the Jedis blur effect when he runs (is that a "fx" file or maybe a "tga" file ?)
BlurEffect = "x.x"