Warning to anyone palying mirage:

then they should remove that function all together no point in putting false traits into an ability. Being invisible wouldn't be "game breaking: not like he can shoot or anything while stealthed. All's the ability does is make you a sitting duck

Mirage isn't supposed to be invisible when using his ultimate @ServireEtTueri  what it does is deploys a team of Decoys to distract enemies while you cloak and run away.

I find it great for distracting the enemy and getting into a better tactical position. 

Darko

I find the best use is to pop in in a moment of confusion and set up the an attack from the side or rear. Folks will still look for the outline so you have to be sneaky, but the reduced visibily can help you slip away during the chaos of a firefight.

It's one of the better Ultimates once you start using it correctly. You're not supposed to be 100% invisible, you're supposed to be cloaked just enough that the focus shifts from you to the decoys. It's mainly an "OH SH*T" button when under fire but you can use it to surprise enemies if they are running around a corner. They run smack in to a bunch of Mirage decoys and panic fire, letting you get the jmp on them.

Guys, you joking right? Best ultimate in the game? Except during this short period of time you can't do anything and if the bullet hits you, you become visible for a really short time, and you can't do anything besides run and cry, every time I use the ult, enemies will just shoot me through the decoys, every time I'm trying to sneak on them from behind, they just do 360 shredding me with bullets, so yeah, I think it needs to be reworked.

Honestly I think his ultimate would be better without the decoys. Its semi invisibility and speed boost is great for flanking.