By restricting gold to a 4th-tier ore, you make it a "precious metal" as opposed to a "common metal". Yeah, everyone wants more of it, but that increases its value.I only have one complaint about ore distribution now... why doesn't Gold Ore have it's own vein?
In the Guide, there is a chart (from the wiki I believe) showing the various Ores, grouped by Primary/Secondary/In-Between/Around.
Here's the line for Gold: Magnetite/Magnetite/Vanadium Magnetite/Gold
So that means Gold is the Quaternary, or "Around", Ore. And that means there isn't very much of it to be found.
Gold is a popular material. Too popular for its rarity. And since most mods didn't account for gold being so rare in a world, they use gold as a construction material too much (Ender IO for example uses a lot of gold).
How do some of you handle the gold deficiency? Do you go right to bees and get them started ASAP? Do you build an immense Obsidian Portal matrix in the sky for a Zombie Pigman farm? Do you have a method I didn't think of yet?
In gregtech, this provides some interesting resource management decisions. In particular, you can look into processing your magnetite through a chemical bath with mercury, which gives a great deal of gold. You can also ensure you process copper the "proper" way so as to get gold as a byproduct (I believe you can still do this anyway.)
If you're like me, you'll probably work around the problem a bit by creating a mob spawner (of whatever kind you like) and simply getting gold through that. ( A cursed-earth mob-spawner in the overworld will create a great deal of gold via armor. A nether spawner works even better)