I actually think Dynamic takes away the ups and downs. Or at least does it too quickly. If I go on a 3 game slump offensively, the difficulty will become easier and allow me to get out of that slump. If I get hot for a week, the game gets harder and my team falls back.
If I put together a great roster, I should be able to dominate consistently without the game getting more difficult. If my team sucks, it should show.
I used it in the past to get to a sweet spot where the results felt good, then put the progression slider on 0 to keep it there. I wouldn't recommend leaving the slider at 5 or something, but I think it can work to get to your sweet spot without having to mess with individual sliders as much. I don't know if it's ever going to happen, but it would be amazing if they could transfer your DD setting with the carryover.