What I don't get is, why do they have weapon focus (and racial weapon damage bonus feats), but have not yet introduced the same for implements. Clearly it's not overpowered since there are plenty of classes that can use weapons as implements now. What is so powerful about the wand or the rod, that having implement focus rod might break some other mechanic?
Also there is all this racial weapon support, but nothing for implements. How hard or unbalancing would it be to make a feat that lets a tiefling infernal warlock get +2 feat bonus to damage rolls with rods and pact daggers, or a feat that lets an elf wizard have a +2 feat bonus to damage rolls with wands and orbs, or a feat that lets a deva paladin have a +2 feat bonus to damage rolls with a holy symbol, or a feat that lets a goliath shaman gain a +2 feat bonus to damage rolls with a totem?
Also there is all this racial weapon support, but nothing for implements. How hard or unbalancing would it be to make a feat that lets a tiefling infernal warlock get +2 feat bonus to damage rolls with rods and pact daggers, or a feat that lets an elf wizard have a +2 feat bonus to damage rolls with wands and orbs, or a feat that lets a deva paladin have a +2 feat bonus to damage rolls with a holy symbol, or a feat that lets a goliath shaman gain a +2 feat bonus to damage rolls with a totem?