This, pretty much. Maybe not the total destruction of Coruscant, (because I doubt it could be rebuilt in time for the movies) but otherwise pretty spot on.
Do u really think the Sith would do so? Its funny but the most "Fighters" of the Empire (Bountyhunter, Chiss, the most Sith ect.) would give a **** if they see that the Empire will be entirely destroyed. The most Bounty Hunters would say that job isnt payed good enough (fight untill dieing in the ruins of the worst nation ever existed), the Chiss would go nbach to their own Empire if they know that the Sith Empire is no Danger for them anymore, and the rest of ur evil followers would prefer to rescue their own life instead of Defend a Dead Nation.