You see, they have never been a bad choice, they just competed with crisis suits, and were comparatively less useful. But in 6th edition, they may actually warrant having one of those slots. With the coming of the 6th edition tau FAQ, stealth field generators were changed to give the unit using them both the 'shrouded' and 'stealth' USR. These guys now get a 4+ cover save in the open, and a 2+ cover save in literally any actual cover. That, and the new fragility of light vehicles bringing back foot lists. Now all that S5 AP5 firepower may actually come in handy. There are a few ways I can see them being run.
1. No drones, 2 meltas.
This way would generally look like 6x Stealth Suits, 2x Fusion blasters, team leader (precision shots) for 189 points. If you want, you can skip the team leader and lower the cost by a few points, but I wouldn't because the chance to snipe a commissar has too much potential use, even with the Look Out Sir! rolls. The can put the hurt on transports and most forms of infantry, are a hell of a pain to kill, and can keep out of assault fairly well with their 2D6" jet move. I would give a burst cannon to the team leader to raise the chance of a precision shot.
2. Mid size, with drones.
Taking 4 Stealth suits with 8 gun drones is a unit with 12 2+ saves in cover, quite scary, and will run you around 200 points. Now it is especially important to give one of the suits team leader status here as his drones will inherit his character status, meaning they can accept and issue challenges, as well as being able to make even more precision shots.
3. Stealth Cloud.
So much better than it used to be, though still somewhat pricey. 6 Stealth Suits, 12 gun drones. 18 2+ saves (except for T3, as durable as 9 paladins! Even more so against weapons with strong AP value). Throw some fusion blasters in there too, if you want. Laugh as your overwatch actually manages to do something (~7 hits, pretty high for overwatch). Tear IG blobs to pieces and laugh as their little flash lights manage to fail against your cover save, and with only drones dying even when it gets through.
