I don't see how you can say that an SL's lowest priority is spawn position for his squad. I'm guessing that's what you would like it to be, but I think for winning matches the way the game is designed right now, his spawnpoint role is the most important job on the entire team. I'd rank them 4,1,2,3. Having a spawn up close to the action is probably the most important factor in defending and holding a line, we all know what happens when a spawnpoint moves back (even before a cap is complete sometimes, right Kwajalein?) and its critically important for flanking a position on offense too, and establishing a base of fire from somewhere other than a few meters in front of the default spawns...
Personally I do think though, that the SL's priority changes with the number of men in his squad. My rule of thumb is a rule of five. If I have five or more men in my squad, then my top priority is to spawn them in an advantageous position. The firepower they bring to bear should have a greater effect than anything I could do by myself. If I have less than five squadmates, then my priorities are artillery marks, smoke, and capping Rambo-style, in that order.