This thing looks pretty beast for sure...
Only problem I see is that, even if you don't see their entire team before hand you will not be sending this thing out before Sand Storm goes down. And if this thing gets as successful as it seems like it will be you can be sure that Hippowdon or Tyranitar will come out before it to get the Sand Stream.
So, this thing will be very easy to see coming and allow you to prepare for it accordingly.
That's not to say it will be hard to prepare for; because even with no boost it will be hitting extremely hard.
I foresee Swampert increasing in usage because of this; I remember Swampert being pretty good against Tyranitar.