Bargeld, Thanks for sharing the details on Laufer. Its a great contribution to the conversation. I have a character which is a "pretty good" spotter Glow - HNs -. I can self buff to 99 Spot. (52 ranks w/ESF, wis bonus 7, 30 from spells 10 from gear) Its aasimar so no keen senses but, I have my super/awesome/terrific aura!!
It seems that even with Aura up, I can't spot Laufer at all. If I see him I attack but the queue is broken before I swing. I press detect mode and see him walking at a distance. I undetect to try and catch up. I click attack and the queue is immediately broken and I can't see him again. I press detect and see him walking at a distance. I think this is because given a 50/50 chance of hide means that he only has to try to hide twice to succeed. For him to try and Hide twice or three or four times isn't an exploit currently. Its simply the way it works. He can simply try until he succeeds.
Additionally, Laufer still isn't an easy kill even if I could spot him. I think I have a pretty versatile build and shoud be pretty nasty for a Sneaker. Say I DO manage to get one attack off Laufer has Epic Dodge - Attack Evaded. Or say he just runs, well I can't catch him he has monk levels for speed. Even with my 20% bump from 6 monk levels and Haste on my character he just runs around and laughs.

Oh!! I'll hit him with IGMS but his SR blocks it. Laufer won't be worthless by a change. Solid build.
He should still be able to beat a lot of build 1v1. However, he should NOT be able to run around a relic room with 8 defenders who can't touch him. I've only seen him taken down by HB, Barb Roar and Fighter KD. And even in those scenarios, The Caster/Barb/Fighter weren't able to make the kill. It takes one or more other players around to kill him in that next round. Cause if they can't, he gets up and hides and rests/heals in seclusion and the 20 min chase ensues. 7,8,9 vs 1 shouldn't be possible.
Sneaky, FYI. The rock paper scissors example: the HIPser doesn't need a melee character to counter his Spotter Foe - He needs a Dispeller. What spotter build isn't dispellable? The only real way to build an untouchable spotter is a Ranger/Monk with Keen Sense who gets buffed by a Pure Caster with Div focus. In other words it requires two characters uniquely focused builds (worthless against most others) in order to counter a good sneaker accompanied by any pure caster as support.
As far as I care, I'd be fine with them adding more spot/listen AND more hide/ms gear after the change.
- Glow -