The vision they had was to put out something very nice and they knew people would buy it up. They also knew that they would nerf them after they sold a certain amount.
You cannot be naive enough to think that the devs put out OP things without knowing they would erg them . I'm with you and could care less if they do nerf the sla's, but I only see this bait/switch as driving away players and not bringing in new ones.