Regarding working in the 2D (Control W) mode - no. This is a limitation solely with X-Plane, as we rely on modifying their G1000. If we were using just the stock G1000, then this wouldn't have the issue, but its out of our control.
Regarding the parking brake, the command to toggle the break (using a joystick button, keyboard, or similar) is "Toggle brakes Maximum Effort". In 1.2.0 as you note, we also have a system to disengage the parking break without the command. To turn this feature on, in X-Plane 11/Aircraft/X-Aviation/TorqueSim SR22 Series/SR22 (or SR22TN)/plugins/sr_systems/settings, there is a file "settings.cfg". In that file, set park_brake_auto_release to 1. Then, when you are loaded in the aircraft with the parking brake set (as X-Plane will start the sim with it engaged), fully depress both toe brakes simultaneously, when you release the toe brakes together, the parking brake will disengage.