I agree, if you're doing a render for a client, these things need to be simple and quick. it probably took me as long to shutter 2 lights, as it did build the set (it was only a simple set though! lol)
Also, maybe this is a comment for a new thread, but I also noticed, that once i apply a shutter, i cannot effect its focus on the render. Say i want to shutter off a light hitting a lectern to stop it spilling onto the screen, I would want to soft focus it, even though it is shuttered, or even spotting a logo on a set, I may want a shuttered soft focus halo, rather than a hard edge. I am most likely missing a trick which creates this effect, as I am new to this!