Problem is that if you micro a bit far reclaiming a relic you can fail the reclaiming. Also all small relics must be doable at lvl 4-5. That wave was really too hard, I only made it slighty easier tought.
I also tought at the start of the design to rename the heroes and build a new story around them. But I concluded that they are too well know faces, people will end calling them Nova, Raynor, Tychus, and so on. But I'll rethink about it later. I have still much work to do.
About the Nova's weapon CD I'll look at it. I don't know how to do it, but must be easy looking at the Siege Tank.