I played four games with my full army, as posted a little way back in this thread. I won two and lost two.
The wizard hat goblin was ineffective, and wasn't even particularly amusing. He rolled life magic twice (vs empire), light once (vs dwarfs), and metal once (vs skaven). He had regrowth and throne of vines in one game (which restored a small number of dead orcs, but was otherwise inconsequential), and awakening woods and thorn shield in another (thorn shield killed a few swordsmen). Against skaven, he had the armour-curse spell and the feel-like-lead one, neither of which was necessary. Only against the dwarfs did he get really good spells - timewarp and speed of light - but he couldn't cast them because of the dwarf dispel dice and two dispel runes.
He also spent a lot of time failing stupidity tests and doing nothing. Rubbish!
The goblin unit was actually quite good. They never shot their bows (so I could have saved 20 points there), but the stabby assassins were great for reducing casualties in the unit and also killed a few things. I'd use them again.
The orc unit was rubbish at fighting, as expected: they relied completely on the general and bsb to kill things, which they did fairly well.
The shaman lord's magic did very little - his unit failed a lot of animosity tests, and often ended up facing the wrong way. Neither did he get much use of of foot of gork, which hit my own unit the one time it was cast. He did use hand of gork a few times, but that spell is less dangerous than it sounds.
The savage orcs were amazing if they managed to get into combat with something worthwhile. But they spent a lot of time messing around and failing animosity tests instead.
Doom divers = amazing, and always useful (they killed a lot of knights, a wizard, and lots of other things). Stone throwers = not. But I'm glad I had them for the potential threat.
Wolf riders = really good! Against the skaven they killed a warp cannon and caused mass panic, while against the dwarfs they killed a cannon and organ gun. If anything, I want more of these. But I have spider riders instead.
Mangler squig: didn't do much. It killed a few skaven and not much else.
As for the pump wagons: I think I had too many. They did little except draw attention, and were hard to deploy and control (they kept stopping just short of enemies, allowing them to be charged). I did get to kill most of commandant's knight unit with the no-save one, but only because he accidentally ended up in range of it.
After having a terrible time with animosity, I'm actually thinking about bringing back the black orcs. They don't look as overpriced now that greatswords are also.
Maybe I wanted my megaspider? I'm not sure how Finlay's did this time.