2 Olga The Cyclops will only throw goblins if their unit is standing on the adjacent cell. When hovering over the enemy, a throwing arrow will appear; no additional buttons need to be pressed. Shamans with a chain also kill adjacent goblins to gain mana, so lightning charges up quite quickly. In any case, one goblin is consumed from the unit.
As for the Barbarians, their creativity won't just run out; this is the last expansion for the 5th installment, so they won't need it anymore. However, you are wrong about it being exhausted. You seem to forget that the expansion added not only one race but also doubled each existing one. And that, if you'll excuse me, is 56 new monsters that still need to be balanced.
I figured out the shaman thing with sacrificing goblins – they essentially skip a turn. It's not efficient. The constant proximity of Cyclops to goblins is also debatable – it's too complicated.
I'll forgive you for the 56 new monsters.
And creativity might always be needed.
Overall, the game leaves a very positive impression.
