Would look good on film 
While an interesting idea, i don't think it will work the way you think. giving a "snipe" factor to AS will not make more people use it. If you are on a team, you need to find the right situations to use it. When solo, AS is your best friend.
What will happen to the "If you miss you stay hidden" aspect if you tp in? Will it still work or no? What would even be the point of hide at all actually?
I'm gonna have to /unsign this. I understand where you are coming from, I just don't think it will work the way you think it will.
If I'm understanding this right you want to be able to activate AS while moving from a distance or to apply it to a ranged ability?
I'd have to say no to this when pvp or the arena is involved. Its already easy enough to use AS in pvp as it is. And this would further mess with the already unbalanced castle pvp crap we have now.
Friends don't let friends buy an ncsoft controlled project.
There are some sets that already have a "range" - or even "teleport" - mechanic to them: Claws, Spines and Electrical Melee. (EM, IIRC, is somewhat popular for this as it *can* be followed up with an AS.)
The AS itself is a massive critical, and the Stalker already has defense (and a big boost to AOE defense, which helps) to help use it. It's a situational power (opening or closing, generally.) Range isn't really the issue with it - the long "windup" is, and the playstyle early stalkers started in which gave the AT a bit of a bad name (AS, placate, hit, run.) That long "windup" is also part of the balance *for* the 'big hit.' It's a chance for it to get interrupted.
Something like a "snipe" that hits the same way, I'd expect to have an extremely long recharge or "aim time" or some such. If you're getting rid of the risk, the chance for it to be interrupted, something else would be put in its place.
First off, sorry for not having replied the last couple of days, I've been somewhat busy.
Generally I'm somewhat disappointed of all the dislikes up there, but guess I had more or less expected it anyway 
About the "what happens if you miss"-question, look at it this way. My idea basically is that we are being teleported in front of the targeted enemy. Thus, should you miss, we're simply talking about a teleportation power.
Now, regarding PvP, I'd better be honest and admit that I had totally forgotten about that aspect when I thought of the idea :P Though, I mainly thought of the idea as a PvE addition, used by the stalkers who would have trouble getting a chance to use AS while on teams, where the lead tanker/brute would just storm in and steamroll the very group.
This is basically why I thought of the "snipe" component. When I say "snipe", please have in mind that I'm not talking about a snipe power with AS aspects, I mean a teleporting component for AS with snipe range, where the stalker is being teleported right in front of his AS-prey, with the abovementioned advantage.
This in mind, I have also thought of those sets with range/teleport powers, because, at least as far as I know, a claw stalker on a team does not see his Focus as a ranged AS, but "just" a part of his attack chain that is ranged (or an attack for runners). But yeah, should the power, in spite of what I think, be implemented, it should have something like a minute long, unaffected, recharge time, as it would then fit more or less with the stalker Alpha Strike on a new group.
The reason I thought of this was mainly to give Stalkers a bit more prestige, to make them look more cool and stylish. I didn't think of it as a means to bypass the Hide-effect or the interruptable effect, just a way to make stalkers more attractive to people critical of them.
@Global: Difficult One
Playing on European Servers (Union, Defiant)
If a person turns down an idea, he turns down an opportunity to evolve himself
Before I tell about my idea, I want to point out that this is only an IDEA. It's not something I think the Stalker lacks or an aspect that's needed to make the AT more interesting, it's just a thought I got that I thought I'd hear other people's thoughts about (the word 'thought' was used a lot there, sorry :P).
Now, onto the idea. Why I got this idea I can't really tell, guess I was just daydreaming :P
The idea is a specific, unique perhaps, mechanic to AS. Imagine for a second: You are activating your AS in front of the desired target, waiting 3 secs to see the effect, depending on set ofc. Though, my thought was that in other media (games, manga, anime's, you name it), the assassin is able to execute his fatal blow from a distance, either by shooting something or by running towards the enemy...
Thought no. 2 -running towards your enemy- is the core of my idea. Though, as all people with even mediocre experience with stalkers know, moving while posing the AS will annull the power. My idea is to let us get teleported to the target while posing the AS (where, ofc, we are not to be interrupted).
This will be done by giving access to the average AS, as well as a "Teleport Melee" AS with quite a big range (thinking of sniping distance, 100 ft-ish) that works by letting the stalker target an enemy, whom they will then get teleported in front of right before executing AS, so that the cast time will work as a way for the stalker to avoid too much disturbance while preparing the AS, which might also make AS more frequently used.
I thought about also letting the attack execute from out of Point of View, but that might be too overpowered, should the concept get considered as actually being let into the game.
So please, tell me your thoughts about the idea. Once again, I don't feel that this should get implemented in game to better Stalkers, I just had a thought I'd like to hear others' thoughts about
@Global: Difficult One
Playing on European Servers (Union, Defiant)
If a person turns down an idea, he turns down an opportunity to evolve himself