Really, though, my biggest complaint is the size of the dragons. Based on what I've researched online, I'm not alone. Apparently, for example, the blue dragon in the Tyranny of Dragons set is supposed to be an adult blue dragon, and the one in the Elemental Evil set is supposed to be a young blue dragon. This works okay with the blue dragon wyrmling from the earlier set, but I have to say, I wish the bases would take up the correct amount of space for the size category. Especially when you consider the ancient silver dragon's base correctly represents it at 4x4", whereas the adult red dragon's base is literally half the size and the mini itself is even less than that.
It's really confusing and overall I was expecting the figures for, say, a young blue dragon, to be significantly larger than a medium-sized orc, but it's not. It doesn't even look like an adult dragon from these sets could swallow an Orog or an Orc. I don't know if there was a conscious canon decision by WotC to make dragons smaller in this version of D&D or what, but it's a little jarring when the PCs go up against an adult White Dragon and he's about the same physical size as an every day ogre or the horse ridden by the Zhentarim Cavalry.