Also, a much higher chance of someone realising "He was over there, and he is now there" or "He is me".

The thing is though, not many people actually think about 'Oh, he looks like that guy, one is a probably a spy.' Unless you're being outrageously bad as a spy and bumping into everyone and walking into sentries, nobody will likely notice. However the hat transfer thing can be a huge problem if your enemy has an unusual, because being so uncommon and rare, they make you easy to pick from the group when only one guy has one.

Easy solution: Don't disguise as enemies with unusuals.
Eg, if it's a sniper with an unusual, go engineer instead.

Sure, but even then your name doesn't always match your targets class when cloaked. I've run into plenty Spies disguised as me but for instance as a Heavy when I'm a scout. This could possibly be them disguising as me before I switch class but this happens even for classes I haven't played that round, so my guess is that it's random.

If they disguise as a class that the other team has none of, then it'll just pick a random name. Otherwise, it'll always pick the name of someone playing as that class.

Disguised spies do not display unusual effects.

And unless the other team has hella engies, the point of being spy isn't to be good at blending in, it's to stab everyone, and the disguises are just a means to that end.

Ever played with another competent spy?
I assure you it's hella fun.
One spy shocks the engineer buildings, the other stabs the engineer. If there are any more enemies present, follow up with dual revolver ownage.

Good spies are amazing team players. I've more than once found myself accidentally too far back in the enemy lines when flanking as a pyro only to coordinate with a spy to burn through a three engie nest.

Your Eternal Reward is amazing during the frantic last few meters of a Payload match.
The enemy has deployed many Heavys and Engies, as well as snipers. You can just do a merry dance, left to right, disguised as them between the running.

Don't even bother with Alliance Of Valiant Arms.

I was thinking about downloading Global Agenda: Free Agent.
I deleted TF2, it bored me pretty quick, so I wanted to know opinions of Global Agenda from people who have played it.

Gameplay wise, pretty good.

A warning, though. That game is so ♥♥♥♥ huge it took me 2 days to install on a reasonably good internet connection, tohugh most of it was actual installation, as opposed to downloading the installer. Upon this, the graphics were so GPU intense my computer couldn't handle it.

Well, I downloaded it in 2-3 hours aprox., installation took a good time though.

But! I set the settings on everything to the lowest and stuff to maximize gameplay and my computer lagged kinda a lot.

It's frustrating, the game looked pretty good

It's a mmo/fps that is primarily focussed on pvp arena combat.

It uses the unreal 3 engine.

Skill > gametime

That's just about everything there is to say.