They are adding the new while making the previous behavior accessible. FTA:
Classic Quake Live isn't being abandoned
While these changes are part of the new default Quake Live ruleset, the majority of them can be avoided by opting for Classic ruleset games. All the public Duel servers will run in Classic mode, and Create Match will let subscribers pick from Quake Live, Classic and Turbo rulesets. That's another thing – PQL (Promode Quake Live) is now called Turbo. As the Quake Live team explain it: "We hope that running our FFA [Free For All] and Teamplay servers with these new, fun, and accessible mechanics that we can begin to build a larger base of players who could then try their luck at the Classic Duel experience."