Also, if you can steal tech points, then they will be traded for on the market (kinda like naquadriah in chaos). They should be "unstealable", and they whould grow very slowly. Also, ascended people should technically be able to already have all tech...
I'm only commenting on the tech stealing idea because it's the only thing I read. Sometimes, being concise is helpful.
Here's how I think stealing tech should go:
You get tech points with a level that is similar to alert levels. The higher the level, the more tech points you get, but the less income you get. The more tech points you have, the more the chance that you steal tech. Everytime you attack, you might lose a tech point, but maybe 1% of the time, you can get a 1% increase to stats. (Whole techs would imbalance the game too much. The last Asgard defense tech alone doubles your defense.)
-Jason



.