The idea of a "Linden Blvd Crosstown" is interesting, but I would move the western terminal to Woodhaven/Cross Bay Blvd (for transfers to/from the and Q11/Q21/Q52/Q53) and maybe add a stop at Resort World. Also, I'm not sure it would be busy enough at first to warrant a Limited variant.
Then again, does your new route need to run all the way out on Linden to 235th? Maybe send it up to QCC ("Linden-Springfield Crosstown"?) so it can serve a major activity center and relieve pressure on the Q27.