Yes, that would be a nice feature. Although it's possible to clip the geometry using a spline (Generator->Clipping Area), it works only in one plane by RC object, and is not parametric.
As you pointed, in this case should be necessary to use booleans. Currently this is a problem because the Max boolean function doesn't work well (we use it for the clipping areas), so we should find an boolean alternative before. If possible, we'll work on this issue for next updates.
Thanks for your suggestion,