Currently not, though we can set the default back to 50% if that's better.
There will (soon!) be a way to define more parameters and to give them default values, which will take care of the initial state.
Having user defined presets is a good feature, could you add it as a feature request on github please?
We've discussed presets here in the past. It's nice because they could work over web midi as well, giving you a recall method.