Played over 1000 hours of HAWKEN, and about 30 - 40 % of that time as Predator and Infiltrator only, so i know what we're talking of. Every1 trying 2 get use 2 Infiltrator and/or Predator overestimates the effectiveness of the cloaking device 2 a degree. Also i did at the beginning. I've watched the betta stealth players in EU 2 learn from them how 2 get betta - just 2 find out, that they DON'T rely too much on their cloak. As Infiltrator i learned 2 walk uncloaked most of the time instead of dodg�ng and boosting around, until an enemy shows up on radar in vicinity that's far enough from his team, so i try 2 alpha-strike him unnoticed and - preferably UNCLOAKED, if possible, giving me the advantage 2 cloak midfight when needed, boost over/behind/beside my foe until he's really confused and BETA-strike him full-salvo. In most cases he's crap after that - if not (because he's a fat c-class) - i usually have still enough fuel 2 boost out of sight, make him follow me desperately, and bait him in2 sure death, finally. Sometimes it's even possible 2 cloak mid-fight, pretend a getaway, and return sudden 2 the unsuspecting foe, beta-striking him saucily while he's repairing. I had a lot of success with that tactic. Of course that only works, if we keep fighting 1 vs.1, and not with suspicious pro-players included 4 they ain't tricked so easily.
With the Predator's cloak, it's another story, because of the 1-hit-decloak effect, but the Infil's fuel consumption is quite ok with me atm, because u can't be kicked outta invisibility in most of the cases. However - i could see an improvement in Grollourdo's suggestion with fuel recharging while cloaked and not moving. That would give the Infil betta stalking range and the ability 2 pursui foes much longa undetected. I like the idea, and i don't believe it would break the balance - the cooldown time could still be kept up imho 2 prevent the Infils stayin cloaked all the time.
Regarding deadly alpha-strikes... Recently in EU, playing as Predator in PROSK i was out of sight of 90% of the whole map. I was cloaked, standing on a hidden step with a wall in my back, 2 stories high above a firefight, i was watching from above, waiting 4 the right moment 2 engage. I didn't move (not even the cam), 2 ensure no1 takes notice of me until i strike down. All combatants below were absolutely distracted by dancing Tango around each other, and i was far far away from their line of sight. I couldn't see any other foes... ...then... - KA-BOOOM !!! - i was dead in a single shot from nowhere. 485 HPs gone in a split-second. Was a Grenadier, i didn't see b4. I was so perplex, i even didn't read his nickname, but checked his internals 4 an explanation, y he possibly could b able 2 1-shot-kill me maybe... but didn't find something that would xplain it. So far 4 the effectiveness of the cloaking device in general... I'm not sure what astounded me moa - the ability of that Grenadier 2 spot me with the greatest ease at the most unlikely positon while staying absolutely static, or his ability 2 alpha-strike me 2 death with a single lob of grenades. You can believe whatcha want, guys, but i am absolutely sure there R some of us out there cheating like hell. Usually these players end up as MVP, and leave the server sudden wthout a word after 1 single match. They don't react on questions, even when expressed polite. No illusions about bugs, glitches or such - there is much more behind it, 4 sure. I've also seen MANY weird situations while unnoticed in Stalker mode, like 1 severely damaged Scout overwhelming 2 absolutely mint Assaults down in the center building of FACILITY so fast in 2 single-burst attacks. It was ova 4 them after 2 dodges! I just watched it with an open mouth, and died a second later by that Scouts ovapowered weaponry, like a helpless noob. It's accuracy and firepower was only excelled by the insane lightspeed he moved with while dodging almost uninterrupted. I have absolute no doubt he was a cheater too...
Some guys don't understand the meaning of the concept "fairness" - sad, but definitely true...
"Those who forge swords to plowshares will later plow 4 those who didn't that..."