I'm fine with the current state of the 717. I can fly it, easily.
But then again an update which could potentially add  new McDonnell Douglas planes, the MD-81, MD-82, MD-83, MD-87, MD-88 and MD-90. (Possibly the DC-9). Wingflex this aircraft has, as well as Cabin and Cockpit lights. As well as the Cargo Holds.
But for now, I'm fine with the current B717. Has the liveries I need, and it is a real easy plane to fly.