well in my mind the close mics do also pick up some room reflection, no?
But yes, you probably are right about the dry signal. As for now I just use a second MIR plugin and place the "close" instrument close to the decca tree.
I also use the ORIGINAL sound as another path.
I hear some nice reverb on the CLOSE mike that gives me a kind of "real sound" in the room, which the DRY and ORIGINAL sound does lack.