Major problems with Heracross/Machamp/etc as the burn will boost it's power to obscene levels, so be prepared. The other major problems stems from the lack of leftovers. Specifically, Sandstorm and Hail now hurt.
Machamp usually runs No Guard, so that should not be a massive problem. Heracross is a problem anyway, if you run toxic as your status move it will still have a free guts boost.
The set seems fine, Fling could also help getting rid of random choice scarves\ specs tricked onto Blissey, though, if I recall correctly fling is not programmed yet on shoddy.