I can tell you from direct experience with a Blichmann false bottom in my BK and a Therminator that you will have no absolutely no luck with pellet hops and a false bottom. None whatsoever. You will feel much pain.
However, with whole leaf, especially whole intact cones, you will have limited to full success with this approach. If your whole leaf is kind of ratty and the cones are mostly destroyed, you will get a very slow flow. It only takes a few leaves to plug up the therminator. My best success has been with whole leaf and a hopstopper but I've had good results with a large hopsack/pellets combined with the blichmann false bottom/intact whole leaf.
Here's a pic of my original hopsack holder which uses the smaller hopsack. Since then I've cut it down to allow for the use of the larger hopsacks which has helped some with utilization. It's still not as nice as free hop pellets in the wort but I've gone to a whirlpool and an IC for bigger pellet loads with good success.
As you can see this approach works (this batch had a schit-ton of pellet hop, it was essentially a Ruination clone) but utilization may be effected somewhat by the hopsack approach