I use a ratcheting screwdriver in my job at a computer repair shop. For smaller screws, I use a precision screwdriver, in which I do just spin the shaft with the top of the screwdriver in my palm, but I sometimes need the larger screwdriver for more force.

1. Often true, and I often do that on my ratcheting screwdriver. However, it's faster still to use two hands, one on the handle and one on the shaft, and alternate them. While the handle is ratcheting back, the shaft continues turning, so it ends up screwing or unscrewing twice as fast (or at least faster; I know that moving your hand is pretty fast). Also, when working on a screw that requires more force, the ratchet allows me to apply that force without repositioning my hand frequently, again making it faster.
2. Again, I totally agree. This is especially important on small screws or when screwing into plastic, which I work with often. That's a good point about how low back drag (thanks for the name) makes it more difficult. I was thinking that it would make it easier when screwing into certain materials that change their resistance as I screw, but maybe the back drag I have on my current screwdriver is a good amount.

Yeah, if you don't like ratcheting screwdrivers, you definitely won't like the LTT screwdriver. That's fair. I think they make me faster, but it's up to personal preference.