Yes it is. The same Republic that did the Ruusan Reformation is the same Republic that survived the New Sith Wars, which is the same Republic that had 1000 years of peace prior to the New Sith Wars, which is the same Republic in TOR, which is the same Republic that's existed for almost 25,0000 years.
The Republic only ever had periods of decline; it never fell until it destroyed itself. That was the significance of Darth Bane.