All good stuff. I think part of the problem is that (for all of us) this is our first real narrative 'loose' system. They're to a greater or lesser extent grounded in D20 stuff like Pathfinder/D&D or % stuff like Dark Heresy. I sometimes struggle to instill a 'don't sweat the small stuff, just go with it' mentality. When we're all in the zone it's awesome. When we're not, it's debate time!
Now I know it's GM final say, but I like to at least clue them in on my thinking, and why I'm trying to be as balanced as possible, without either a) murdering them left and right or b) them running roughshod over everything. It's a fine balance!