Well, I don't disagree that scout dps has taken a hit, it has. However, the change to Shot isn't a nerf- the 1 sec GCD on Shot was a bug, not a feature. In this game, the CD on Shot has always been dependent on the speed of the bow- if your bow is a 4 speed, it has a longer CD than a bow with a 1.8 speed.
This is why rogue/scouts almost always look for bows (as opposed to crossbows) with fast speeds. Both the Bow of Assembled Parts and the Toxic Bow are popular r/s choices on Palenque- I am sure servers killing higher end bosses will be using different stuff.
This correction effects scout/x combos a whole lot more than x/scout combos. As a rogue, your dps will be almost unaffected by this change, as r/s has an elite skill I believe which decreases the CD on shot.
Scouts on the other hand have a real reason to be angry- but not because of this change to Shot.
The GCD was removed from caster skills but not from the scout skills with a cast time. GCD was a real nerf to scouts, and scout was not a class that needed a nerf.
The change to Shot will decrease their dps. On it's own, the change to Shot is needed, simply because without it, there is no reason to have a speed on bows and crossbows.
However, they still need to remove the GCD from scout skills that have a cast time. Without GCD on skills with a cast time (such as combo shot and elites), most scout combos will function correctly.