The Bronica has regular manual focusing, so you can set hyperfocal distance if you like, or just use the nice Leica-ish rangefinder. Kinda like a big Leica M7...
The Fuji GA is more like a big Contax G1, but with a built-in flash and fixed lens. I too have had dumb focus errors, like focusing on the wall behind my subject... but that's where the focus cross-hairs were when I hit the shutter button! What I do with both the GA645 and the G1 is to line up on an item that I want sharp and half-press the shutter button to lock focus and exposure, then recompose and press all the way down. A two-stage process, and it's best to pay attention to the distance readout to be sure the camera has been able to find focus on the object. This takes some practice! I think these cameras are "happiest" when doing all their auto-everything, but you have to learn how to get them to automatically do what you want!
Color negative and chromogenic black&white films have a lot of overexposure leeway but no tolerance for underexposure. So I fudge the camera's ISO setting to 2/3 stop lower than the box speed rating. Fuji NPH400 at EI 250, for instance. And I tend to use ISO 400 and 800 speed films in the 645 cameras. So, I have some margin for exposure error on both sides, and this works pretty well.
Here are a couple shots in Makawao on Maui, one where I used my head and nailed the focus, and one where I didn't!
(GA645Wi, Fuji NPZ800 @500)