KGB, in AD&D, all dragons cause fear. The green dragon breathes poison while the black dragon breathes acid. So, your argument there boils down to: the green dragon should cause fear because that is the way DLR did it. Not particularly compelling IMO.
KenC80, I played all of the first 3 warlords titles to death, and DLR was (far and away) the best of the three. Having units with varying numbers of wounds really sets them apart, separating heavy tanky units from more fragile ones in a way that city walls or dragon backup can't replicate. I don't much care for the arbitrary way wounds are being tacked on to units in warbarons though. Dragons are big, shouldn't the RD have a third wound? And we had a 3 wound unicorn for a while. This just seems out of wack from a common sense angle.
I think the GD just needs to get a cost decrease. 1800 is just too high. 4 turns is a long time to wait for a front rank fighter that might be killed by an elf in your next battle. So, you shouldn't have to pay through the nose to get the privilege. I'm not sure if they would get built much more at 1400 g, but it would be worth a try.