So to summaraize:
Evil needs some breadcrumbs to entice you to do it's bidding, weither that's promises of power, items, a solution for the tadpole or membership into the big fun evil club of evil
The gate battle is awesome and should have NPCs on good side suggesting to 'take on' the goblins by luring them to attack
Evil needs much, much better payoff that doesn't make you feel alienated and foolish for choosing that path
good points well made! +1
