Close but not quite.<br/><br/>Low light vision is actually not that simple. It basically doubles the effectiveness of light sources, and that's about it. So if a lantern illuminates an area in a 30ft radius, the character treats a 60ft area as illuminated instead. Probably not hugely useful most of the time.<br/><br/>All characters can see in Dim Light. Your opponent gains concealment(20%miss chance), but that's about it.<br/><br/>In darkness, if you don't have darkvision, you're blinded(And while it denies you AC, you're not technically flatfooted - That's a whole other condition). You also gain total concealment(50% miss) against anyone who can't see in the dark, so it's not all bad.<br/><br/>Also, delaying is even simpler than was described above. You just say I'm delaying, then you wait until you wish to act. Your initiative then becomes whatever initiative you acted on from there on after. It's actually really useful for rogues, in setting up flanking and sneak attacks and the like, since it lets you wait for an ally to move before you position yourself to deliver the pain.