Egbert,
I've had the TQ now for a few months and enjoy it immensely. My experience has been that with certain panels, e.g., Tony D'Ambrosio's 777 panel, the spoiler works just as you would like. It is armed in the detente position and extends according to the amount you activate it. I've also found that on certain panels once I activate the spoiler it will not come down using the same lever arm, so I also set aside a toggle button mainly for the purpose of lowering the spoiler to the neutral position.
While you're waiting for Pete to make the changes he is considering, if you're like me and like to tinker, experiment by trying a few different aircraft and see how they respond.