There is a new and amazing information announced publicly to the Inventor Fusion project.
The official Inventor Fusion web site now lists the functionality of the upcoming Inventor Fusion application. The important feature of this tool is the integration (fusion) of the direct history-less modelling with the classic feature- and history-based parametric modelling. So you should able to start a parametric model, perform some quick changes using the quick and intuitive direct modelling, and put the resulting model back to the parametric state.
This sounds very promising, especially with all the 3D CAD formats supported in Inventor. Autodesk Inventor and the Inventor Fusion technology preview should eventually merge into a single product.
There are also several videos presenting the Inventor Fusion functionality. Worth watching.