Throat hit, as I understand it, is just the property that simulates the distinctly substantial feeling of smoke hitting the back of your throat (and down into your lungs). Smokers might call it "harshness," or some other vaguely pejorative term, and so I can understand your misgivings -- but what you should understand is that vapor has no innate harshness, unlike smoke; without nicotine, vapor has basically zero so-called throat hit.
Obviously, zero throat hit isn't a good thing if you want to simulate smoking; as smokers, we all had different preferences with regard to the strength of our smoke, and this is no different in principle -- but you don't want to feel like you're just inhaling air.
So to use you as an example, you're sitting at a high level of nicotine (2.4%, or 24 mg). Too little throat hit probably isn't gonna be a problem for you at that nicotine level (or, indeed, for me, because I vape 24mg juice). But a lot of vapers use significantly less nicotine. A lot of vapers started at high nicotine levels and gradually stepped down for the sake of reducing their dependency on nicotine -- so they look for delivery systems that give them a bigger throat hit to simulate the feel of the higher nicotine juice they used when they started.
I wouldn't worry about it for now. You say you're gonna step down your nicotine; see how that feels, first and foremost.
