The older Merlin VSM SE was a little thin through the mid-bass when placed in free space. The octave to octave balance fleshed out a bit with hear wall placement and actually sounded a bit more natural to my ear. However, I also felt that the speaker's fantastic imaging ability is degraded just a bit when used this way. Some discreet treatment for first reflections and this can be a good solution for your problem. I had them in a slightly smaller space and was generally pleased with the results.
Good Luck
Marty
Good Luck
Marty