I think this is awesome, I was super thrilled to hear this is being explored especially since I use 3dsmax myself 
I do think its problematic that a large portion of the community continually pushes for support of the software they might use, I understand that has needs but you dont see me having a go at Maya tools (like the animation stuff) not supporting 3dsmax. Its because we have alternatives and can make alternatives of our own, unfortunately I feel like calling yourself indie is meant to come with some sense of entitlement from how people approach new features.
Im just glad that this is being pursued because I use splines alot, infact my preferred tool for splines isnt 3dsmax its Adobe Illustrator and I typically export from that to do extrusions in 3dsmax but I could also use Autocad. In terms of new modelling tools and ArchViz work splines are amazing, they can be used to do trims in housing quite quickly by copying the same lines used from the walls so its an extremely powerful technique on its own.
Obviously I want to see support for a wider variety of applications not just in the “indie” space (even though Im an indie who uses Adobe and Autodesk products) but that type of thing takes time and resources that a single programmer might not have, it also adds complexities not just in code but also legalities, format wars etc, I prefer to just have solid tools that work rather than flakey tools that support every application known to man 