My opinions on these minis:
Cave Drake
I'm a bit iffy on this, but it is definately salvagable. Removing the spikes on the legs and the tentecle-horns on the head will vastly improve the mini in my opinon. Also, I think it would look better if you used this as a dragon (with the wings from the dragon mini) and the dragon mini as a Cave Drake.
King's Champion
The minis look alright, nothing special, but nothing too bad either, but definately overpriced.
Gundabad Blackshields' Command
I'm not keen on these guys myself. The shaman looks horrible and is definately inferior to the previous Goblin shaman minis. The drummer looks alright, but the drum itself not so much; I think its a nice concept with the goblin carrying the drum on its back, but the sculpting lets it down and makes it look naff. The Captain looks alright, but I'd need to see more angles to give an acurate judgement - as it stands, I'm not too fussed on the cloak.
Gundabad Blackshields
I think that these would look nice if it weren't for the cloaks. The shields also let them down a bit in my opinion. The biggest redeaming feature is the price - 4 for £8 makes them cheeper than other similar blister packs (which are 2 or 3 for £8) and from the pic of them alongide the regular plastic goblins they look fairly larger so it doesn't seem to be a case of them slipping an extra in to compensate for size. Pity that there's only 3 varients though.
Floi Stonehand
He looks okay, but he's vastly overpriced.