Action/ Intonation question for a Strat?

I just got a used, but very new and in excellent condition Fender American Deluxe FMT HSS strat. It came set up with a pretty low action, which I like. But the 2-point bridge is set up flush to the body, so I can only bring the trem arm down. My question is twofold: first, if I simply tighten the claw screws and retune can I bring the bridge up to a position where i'll be able to go both up and down with the bar, or will this screw up the action? I don't want to have to mess around with any allen wrenches tonight. Second, if I were to do the above, how stable would my tuning be? It's got locking tuners and a roller nut, but I just don't know how much the fact that the bridge is flush to the body is helping with returning to the correct intonation. Would I need something like a tremsetter? Thanks to anyone who answers; it's a fantastic guitar, I just want to know what all i can do with it.