Yes, it makes sense. One problem is that the saddle is longer than my old one, so that is where I have had to make the adjustments- forward/backwards. I keep moving it just a few centimeters at a time, which may be why it's taking so long. As for the tilt, I usually like the down down very, very, slightly. So I just use a level to adjust that, and it seems to be about right.
But as you say, it's where the legs meet the body that seems to notice the difference, so that may just take time.
I won't give up yet