IMHO only the supporter is overpower, he has mines and demolition packs and an ammunition crate...

Overpowered indeed.

1. Safe lays mines.
2. Idiot runs onto mines.
3a. Safe realizes minefield was bad idea because apparently mines still hurt teammates;
3b. Safe places Proton Grenade on mines.
4. Idiot runs into minefield just as Proton Grenade goes off.
5. Safe disconnects.

Yeah, the classes nearly perfectly balanced right now, if we had to replace one of them (which one?) we would have to completely rebalance the whole game

IMHO only the supporter is overpower, he has mines and demolition packs and an ammunition crate...
Think about the BF2 Spec Ops, but only with additional claymores and no problems to get ammunition...

We actually had a Bothan spy modeled and perhaps even textured, dunno what happened to it though...

"Don't let it crawl under that car!"

"Gimme' the shotgun dude."

*BAM*

"Ah, we got it now."

*BANG*

There, problem solved.

I just wanted an excuse to have Bothans and that trooper armor with the hat.

Usually the spies do their work BEFORE the shots are fired

DS1 and DS2 for example.

Not to mention that the roles of "spies" and special forces are covered in FS anyway:

Artillery spotting? Trooper with binoculars.
Reconnaissance and monitoring of enemy activity? Trooper with binoculars.
Sabotage missions? Squads going behind enemy lines. Not that it matters anyhow as anything you blow up seems to respawn after less than minute anyhow.
Etc.

Not to mention, of course, that we're maxed out class-wise. If we are to add another class, we'd have to remove one of the existing ones - Trooper, HWS, Medic, Support or Officer. And that just wouldn't work as the classes are weighed down with equipment as they are and fewer ordinary classes just wouldn't work.

(The spy in the picture also needs some workout against his beer belly - he didn't serve under Vader, what is clear. And i think the fastest thing he ever flyed was his desk in office).

The Stargate Mod for BF2 has a Infiltrator class for the Jaffa, this class uses the same Model as the other side...
IHMO this is a better way to build in a syp...

He's not fat, he's just got his back arched, in addition to his armor.  And yeah, as it turns out, that guy is just the security guard for intelligence compounds.  I just liked the armor for the hat.

I was originally thinking maybe when someone died they would drop a kit which only the spy could pick up and he could blend into the enemy ranks.  (Just the Imp spy, Bothan would be stealthy)

And I don't believe the Imp's also used Bothans as spies, but if they did then maybe each side could have Bothan spies.

Maybe instead of the commander directing troops from an above-view, he is just able to get behind enemy lines and direct them.  It would probably take the help of his team to create distractions for him to get there, and if his team ever needs help he is right there to turn on the other people who have no idea he is an enemy.

But maybe the commander-only class idea thing could live on for other class ideas, such as the often ill-received Darktrooper, and an armored Wookiee to combat him (Of course there would also be a normal Wookiee, perhaps as support.)

Which just gave me another idea, add the heavy armor option back from vanilla, only it determines if support (only support) is Wookiee or Human.  Humans have speed and are harder too hit, while Wookiees are powerful with melee, more resistant to damage, and easier to hit.  I'm pretty sure you guys have already modeled the Wookiee anyways.