Goblin's size.

Goblin's 3d model is really small in size! If you see a pack of TAK Goblins and you haven't played TAK at all, you really can't figure out what this moving thing is. They are tiny for sure! However, I really like using them in big hordes. They are weak aginst any other melee unit, but they are good against slow-moving ranged units, siege units and buildings.

Looks like the perfect Thirsha wave to me... Swoop in, have my wave readied to fire, and just click offensive and it goes off on key.... yummmmm sooo perfect. Playing vs AI?

I can't disagree with you in that. Tier 1 unit hordes are a really yummy wave for every monarch! Liches, Weather Witches, Fire Mages, Acolytes of Anu, Mind Mages, Fallen Angels, Neo Dragons and holy dragons also find those Goblins a delicious target for their spread area attacks! However, tier 1 hordes are not funny at all if you don't have area attacks ready to strike them. Anyway, yes I was playing against AI. If my opponent was human, he/she would have expanded much more than this.