@ SubCommander7142
It has been demonstrated that the training missions are very hard (if not impossible) to complete with GW enabled. The best suggestion is too do these missions before enabling GW.
As for the ships taking a long time to sink this is due to the new damage model, ships will sink from flooding rather than just reducing their hit points. The is a way to reduce these, however, it requires the editing of the .zon files for each ship.
My advise would be to wait another 30days(ish) for GWX to be released as this has totally reworked the damage models.
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