I'de say this is too little information to be completly unhappy about stealth.  The way it was worded, with multiple abilities to go into/detect steath makes me think there will be different types of stealth.  One might make you invisible, one might make you not show up on radar, one might make your thermal invisible, etc.  Then there are matching detections for each type of stealth.  Then you would only be able to have one type of stealth or detection on at a time. 

So if you want to not show up on radar, you can be seen.  If you want to not be seen, you'll show up on radar.  Or if its dark out (or a mob that hunts through thermal vision) and dont want someone with thermal vision to see you, you stealth your heat signiture.  Who know, there might also be a "stealth" so you don't make any noise.

This might only be wishful thinking, but it would make stealth alot less powerful, while still making it effective when used by an intelligent player.  At the same time, like Moll said, a paranoid player could constantly cycle through the stealth detections to keep on the lookout for anyone in any type of stealth.  We really won't know for sure until we either get more info or get to play the game.

i'm hoping the devs continue with their plans for this game, and don't "pre-nerf" stealth, so we get to play an undiluted version of what they have in mind.

once we've played the game then i reckon we'll have fair scope to comment.

Well, I'm assuming that much as well, but my post was really addressing the bolded parts of your point, that it's very easy to assume any full sight-blocking object or terrain will block fire, but how big is a tree before it falls under 'building' category? How tall does a stone wall have to be?  what width does a boulder or terrain element have to be before it's ALLOWED to be considered blocking line of sight? Is there an exposure cap (can I have my rocket launcher sticking out the end of a terrain element and be hit? or is my rocket launcher "graphics" and not "me")

based on those answers this could easily swing from "decent system" to "just point and shoot and forget tactical environments"

nice to see you are well aware of our worries

i understand your concern, but to be honest i see no difference between the paranoia of constantly rotating camera angle to see if someone is about to range-snipe you from afar, and using detection abilities to see if someone is about to melee-sneak you from up close. paranoia is paranoia. so long as we get abilities to counteract and deflect sudden unwanted attention, everything should be just fine.

also it sounds as if we will want to use these stealthing abilities for certain quests, and i really want to see how these quests play out (they sound like fun).

What cover and hiding options? The lack of them?

Planetside handled it perfectly, their cloakers are deadly to a distracted troop or two but easy to put down for the wary, the less they move more invisable they are, standing still is completely invisable and moving/shooting is 25% visable maybe, they only have 1 pistol slot and a knife with reduced inventory space, so less deadly then other troops damage wise but hard to hit and get upclose to the unprepared. Balanced well with one or two quick kill weopons that you can avoid if you hear their prefire sound effects.

Tbh if that is the case, might as well stop making assumptions about a cloaking system in that we clearly have no idea of how it is going really going to work.  So that we may reserve our comments until we actually try it  

*Edit: Adding an explanation to my reasoning*

Really though, if it is not clearly going to be like Planet Side, or any other game with stealth how can you talk about comparison?

The most commonly used game (and criticism) comes from comparing it to WoW.  That game is based on levels, distributed attribute points, loots used to determine how go character is, etc.  So it has no real basis for comparison.  It couldnt possibly be compared to PE since it has no stealth system even though it has an open ended skill system, and similar targeting.  (You can either aim at mobs yourself and fire,  or select the box around the mob and have your target attack it).  NeoCron has one that could be similar to it, but again it is based on levels which are different than WoW's but still not open ended in the way ER will be.  You could also compare it to UO since it had a stealth system and an open ended way of leveling but this does not sound right either.  Eve is a completely different game, and way of doing stealth so you cant compare it to that. 

Not trying to be argumentative, but if we do not compare it to something which we know about then we really have no basis by which to even argue.  So that being said what would be the point of continuing the discussion, aside from perhaps mentioning what we would like it to be like? 

*Puts away soap box*