While Fusion splines have tangent and smooth handles and constraints the workflow is labor intensive and prone to be hard
to use when for example you encounter sketch engine solver bugs or issues.
So below is a design with half a model. To make it somewhat usable everything has to be constraint - that means for each half of the sketch all relevant G1 G2 handles have to be taken care off. Thats a lot of extra work. In addition the major shortcomming of fit point based splines is adjusting one handle of one point affects the complete curve. Thats rather terrible when when you created a nice profile because now you have to enjoy adjusting everything else as well to make it fit again.

A much better appraoch would be to work with two halfs and span a blend curve inbetween like I did with Moi here
which is a common workflow in any other surface modeler as well. The advantage is that I only have to deal with
the points of the half side and the blend will update automatically.


In the example above when I change the curve that is right above the nose also the cuvres aling the nose will change - not good at all.
This is a duplicate request because the initial first idea is from 11-12-2013 and the second time I asked for it was from 07-26-2014. We have now 18-6-2015. So what about 11-7-2017? We might have then this tool? Sorry could not resist the tease.