Yes, it’s been on the enhancement list since March, but not as a high priority. I’m quite into the idea of a more general set of multiplicative options (so that one could, e.g., apply modulators to buffers) but – as ever – am loathe to do it in a way that adds much extra complexity to the interface (especially given the emerging theme that interfaces are already too complex!)
One future possibility is that we have separate messages / functions for adding / multiplying, plus some basic support for handling fades via parameters. Sooner or later though we start to encroach on the kind of comprehensive buffer processing territory that @danieleghisi is developing with Ears (which already has a buffer expr type object, for instance).