I just wondered if anyone has tried this and how it performed.  Thought it might be nice to lighten up and cut the sweetness a bit.

So Sorry you didn't get a reply earlier.  Have you tried this yourself by now?  I don't remember now......I might have -- I'm thinking I did as I HATE waste.    Yes, it would lighten it up some but to me PP is sweeter than b'cream so it would not cut the sweetness :)  One  would have to whip the PP before adding it to b'cream or the PP won't whip up - it could be used in place of liquid in the recipe you use but the one I used most often didn't need any liquid.