1d/2d blendspace for all interpolated data types variable:
float, vectors, rotators, transform, maybe for arrays(previous types of variables), 1d blendspace, 2d blendspace (multidimensional blendspaces), another animations types, curves and other.
With access to them from blueprints end anim-blueprints(anim types variable)
something like :
With the ability to configure the card for one variable or for different names variables.
This would be very useful in my opinion.