Are you being serious asking why the members of cp9 are being promoted? They were a highly skilled assassination unit. And during the time skip I'm sure they were still if not even better after enies lobby. Lucci and Kaku became part of cp0 after that. And it wasn't cause they felt bad for them? The strawhats beat them but that doesn't mean they were bad at what they did. They may not be the threat they used to be but don't act like they weren't ever a legitimate threat.
Look, I'm surprised none of them got fired after what happend on Enies Lobby! Just take a moment and see it from a marine perspective right.
- The most dangerous woman in the world escapes
- A secure/important government island gets destroyed
- BY A TINY ASS pirate crew no-one heard about
- All agents get their asses kicked
- They ran off with the giants (they used as slaves)
- The weapon blueprints get burned
Basically their entire mission they worked for years for completely and utterly fails. Someone has to take responsibility for that. The Marines need to explain this to the world government right...
And we all now how forgiving they are, when it comes down to failures that makes them look weak....
All I'm saying is, it does not matter if they are strong now or strong then.. They failed a mission. As a super secret spy that usually means death.