Well considering most of the things in 56+ instances were Blues already... it probly targets the 56- instances (DM/VC/SFK/RFD/etc...)

with the exception of a few greens here and there in the 56+ ones like shcolo and strat , etc...

will still be interesting not to instance for 1+ hours and get a green out of it lol, also means better DE output and more gold out of vendoring and DE'ing lower level drops.