As it only affects skills which are enhanced by stealth - and even then its only extra crit CHANCE - at best it's a chance for higher burst damage.
I suspect the builds you've seen will likely be focused around improving sustained damage, so probably heavily in QK with a nice side of Gambler traits. These builds would result in higher overall DPS.
To answer you question of is it worth it?
Since points are limited, you're never going to be able to produce an "optimal" build while leveling. If you like sneaking up on your target and unleashing a powerful opening strike, sure it might be worth it depending on what the alternative trait possibilities are.
[SIZE=3][b]Leader of [COLOR="#FFD700"]The Rangers of Eriador[/COLOR], Snowbourn[/b][/SIZE]
[color=#00BF00]Brya, Balthelion, Fyore, Iarngard, Madic, Eoradain, Trystana, Pendalas, Kharmul, Arkunir, Holibrand, Tifridh, Freawyn, Adlanniel, Tiraniel, Lilija, Theda[/color]
[URL="http://www.youtube.com/playlist?list=PL0szyANQhriMn42fCDdke1EMAOcdzmr9v"]Let's Play LOTRO (YouTube Series)[/URL] ~ [URL="https://www.lotro.com/forums/showthread.php?461498-The-Rangers-of-Eriador"]Kin Info/Recruitment[/URL]