I have some misgivings about including this. Generally, I think GWizard should express an opinion (like which eventbus to use) when either 1) the thing is difficult/laborious/annoying to set up and/or 2) gwizard itself needs to leverage the thing. At the moment, the eventbus doesn't seem to qualify for either - and there are plenty of differing opinions on this kind of thing.
Maybe in the future it would make sense to add an event bus, but it seems like (for the moment) it doesn't really benefit users much to add this module. Feels like it just saves a couple lines of code.
Jeff