LF can be as simple as any manual slr with a tilt shift lens. You don't have to use the tilt shift until you want to learn it, and you may never decide it is for you. Think of all those old press photos where those functions were never engaged. There is no denying it is clumsier however, and anytime you have to deal with dark slides etc. there is always the chance of fogging and double exposures, but I've never done any of those things
It can be. It doesn't need to be. So far I personally have had no problem using basic daylight exposure with a speed graflex outside. Studio requires some more work, but in my experience, a lot of outdoor or indoor natural light is just experience. Find one film you love and stick to it, and 99% of your work you can just thinkabout, set, and shoot. Unless you do reproductions or long extension work or long exposure, all the tables and nomographs and reciprocity settings aren't really going to intrude into your work.