That's correct, but we are loosing a pretty dangerous feature (the previous restore mechanism did not address the problem of ID clashes), so I am not worried at this moment.
I agree that we should add the support for hazard curve, gmf, gmf scenario and remove the other importers.

The goal of this pull request is just to allow the run-hazard/dump/restore/run-risk workflow with Stochastic Event set. If it is fine for you I would like to address the other hazard outputs in another pull request.