I have done decoction mash hopping for no-boil Berliner Weisse, but generally speaking it does seem like a waste of hops.
As for the yeast strains, I'm surprised even more people didn't distinguish between the two, despite all of the hoppiness. When I use the Conan strain (Omega DIPA) the beers taste very different from anything else I brew, and it's not particularly close.