Well, since the thread is active, I'll go ahead and post my 2 cents.
I just started playing ADC for the first time, and it's great. One of the best mods I've ever played. I love the attention to detail and variety in units, buildings, and graphics. Playing as the Anglo-Saxons on a small map, I'm doing very well. So are the Egyptians, on the other major continent. After discovering to my dismay that they were twice as powerful as I was, I wiped out the Hyksos to my south (never allowed them to get Horses) and built up my infrastructure and military, now I'm neck and neck with Egypt. I'm planning an invasion as soon as I get a fleet of biremes that can safely sail across the sea.
However, a few things that don't make sense to me are hindering my domination. Why are Iron Ore and Iron different resources? Iron Ore seems to be very rare, and there is not a single instance on my continent or its outlying islands. That's at least a third of the world's land area. So I can't build European Swordsmen unless I capture a source from Egypt (which, with even more land area than me, has only 2 sources). I may have to wait for Smelting for Iron and whatever offense unit it allows before invading Egypt. I got a MGL halfway through the war with the Hyksos, but I'm hesitant to fill the Army until I have some good attack units. Fortunately I can build European Spearman without Iron Ore- but why don't my Tool Age Spearman upgrade to them? Both spearman units upgrade to the European Guard(?) at the end of the second era. So to keep my cities well-defended until then, I would have to build a new defense force from scratch, either disbanding my Tool Age spearmen or keeping them around to upgrade later (which at this point will probably leave me too poor to upgrade them anyway).