Yes and no. As a feature why not, as a priority: nope.
I feel they took a step forward, when it comes to coasters. I mean it could just be the pov, but they feel a lot smoother, so i guess there is a reason, why they added to other tracked rides and not coaster. Especially since tracked rides are obvious the redhaired stepchild of the game. So for our own sanity it may be better that we don't have that option.
Of course down the road, why not, but and i fear some backlash on this sentence, we don't need every option from the first game, sometimes the game can improve and wooden coasters carry a lot of more momentum through the track. The button always felt like an emergency button, when they new they messed up on some layouts.
Bottom line: Yes, if they didn't change the physics they should do this, if they did they need to make sure it is a good experience. In times where people smooth on 4m or lower pieces adding an overall multiplier might not have the desired results.