KilroyMcFadden said:

The size of the bunker explosion doesn't match the reaction to the explosion of Han and the strike team just a few yards away.

I'm pretty sure that isn't an error. When the rebels are in the bunker, you see a long row of reactors, or whatever they are, and they're probably meant to lead to the deflector shield dish, etc. I think it's supposed to be a chain reaction, and the bunker is only an entrance (isn't there something in the movie about them going around to the back entrance instead of going straight to the shield generator?) to the larger complex. That's how I've interpreted it since I was 10 or so.