Would be nice if there was some sort of parametric EQ or tone control that was independent from the room correction system, so both could be used together. The room correction would be automated; used to minimize the room's unwanted contributions. The PEQ would be manual; letting you adjust the overall sound to your personal taste.

More useful with music than with movies. The film industry has standards that mixing rooms adhere to. No such reference in the music industry. Heck, I have garage band CDs that were mixed in... well, a garage. (Must have sounded bright in there, because the high frequencies are completely rolled off.) Access to a PEQ would help compensate for that.