What's the point of make Lucci and Kaku come back as powerful élite agents of CP0... just to have them immediately and casually trashed by Luffy and Zoro?
Sounds like an useless filler
It would have made much more sense for Lucci to fight Sanji or Jinbe, and for Kaku to fight Franky or Nico Robin or Brook
... oh yeah I got it, it's to emphasize how Lucci and Kaku are like boss and right-hand man, while fodder Jabra is a forgotten useless weakling