Well, I got right on this and started testing a while ago. So far there's nothing too impressive. Certainly nothing guarenteed at kill percents.
Saving a frame is always useful, but considering that all of Falcon's dthrow/grab release/whatever --> usmash are only guarenteed possible, this doesn't really change all that much. At low percents, you're about as likely to just hit with your hyphen smash.
Of course, the laggy smashes provide some potential as the BDacus out of their ending animations is very easy. I haven't been trying anything out of smashes... A low percent fmash/dsmash --> BDacus hitstring (more than likely not a combo) would be nice.