1. Didn't keys and certain mindread items glitter before DKS? I played original ED a long time ago, but i vaguely remeber they did.
2. The contents of chests were always random, and certainly so in plain Ego Draconis and old Divinity games too. Granted, the random item generator seems to be gentler in DKS, but you are certainly not guaranteed to get legendary equipment right from the start. It's all chance.