The only thing I can think of is the quality of the buffer in the Behringer chorus - wired up like that it would affect your tone all the time. I'd certainly recommend some sort of buffer on a board, but I reckon there are better quality (more tonally transparent) ones to have permanently in your signal chain. The Boss ones are usually very good, so why not put the chorus on the second loop from the LS2? You'll probably notice a difference in the sound.