Yeah, it’s still flawed no matter if you get rid of the choppiness, but it sure does improve it a little.
The NES version is even better than the arcade, did you check that one? It’s slower than the first game, the game struggles to run and almost stalls. It’s amazing since the first game, while slowing down, it wasn’t an issue and became a hit, the second and third game are so bad.
Since 2 and 3 are bad, I can’t say they’re lazy ports on other platforms, and that’s why the NES version shines, it was made from scratch for the 8 bit hardware, if it was a port, it’d totally be crap.
I wish they all did the same for that era, rarely ports ended up well, it’s surely much easier to just deal with existing assets than recreating them for a better result overall.
Edit: I haven’t tried that, but if you’re familiar with runahead, it could improve the controls in DD2 on the Mega Drive.