@The:
Time for a crazy theory I got from this chapter. I think our adorable and naïve dwarves are up to something devious.
So we have Mansherry who the last few days have come to the Marines for a blood donation to make a healing medicine for the people. Seems innocent enough at first glance, Mansherry wants to help the people out, and the Marines there are of similar mind. She certainly doesn't want to take it from the injured citizens, as they are the ones that need to be healed. However, if you look deeper into it, I find things more suspicious.
First of all, the Tonattas have been keeping tabs on the Marines the whole time. Also notice after Fujitora states his procedure for when to go after the strawhats and offers Osturu to do the honors, that Mansherry shows up. We know from this arc that the dwarves move around quickly and where virtually invisible to the people. They were able to collect information on the Doflamingo people. It stands to reason that the Dwarves knew about Fujitora's procedure and knew they had to prepare for the time when he would make his move. This is where Mansherry comes in. She makes all the Marines take their guard down and just admire how adorable she is. Thus when she asks for donations for the good of the people, how could you not comply? For people who give blood donations, they usually need to eat some food, and are advised to not do much physical activity for a certain amount of time. So for these Marines who gave blood for consecutive days, or Sengoku who gave "10 people's worth", how tired would they be? So that might not be convincing enough reason, but what about this?
This is the third day since Doflamingo was taken down, that means enough time for people to have recovered. Sure, Luffy isn't 100% up, but he's recovered a good bit from everything he has done. Stands to reason that the citizens of Dressrosa would've recovered enough to not be in life threatening condition. Why make more medicine when the rest of the injuries will easily recover by themselves? I feel that this point to the ploy of the dwarves. Under the guise of helping the citizens and innocent Mansherry not raising any eyebrows, why not allow the citizens to recover faster after they went through hell. This allows for a number of days to drain the marines of their vitality, making them even weaker.
Then there's the whole idea of having to get past Fujitora, Otsuru, and Sengoku. One would've been feasible enough for others to distract, but with those three big names the ability for them to be physically held back is practically zero. Some speculate that Fujitora wouldn't go all out anyways because of recent events, but I disagree. We know Fujitora relies on his dice and gambling, but once his path is rolled, he follows it to the end. Add in the fact that if Fujitora wants to push his agenda, he needs to capture them at some point. Therefore, Fujitora means to go all out. Otsuru and Sengoku will also go all out, because even though Sengoku is more laid back, he is a Marine and will do what he must do. Factor in a huge hint of Law possibly confronting Sengoku, Law needs a way to be able to escape after his confrontation. All this points to the Marines needing to be at a disadvantage to even the playing field. The donation decreasing their vitality would be key to this.
So that's my reasoning for thinking this is a possibility. We'll know soon enough if this is true in the next chapter or two since we having the crew finally depart. While I feel it's somewhat valid, I will also admit I am really stretching it here so I don't really expect this to be the case. I just posted it on the off chance this crazy theory with the flimsiest of evidence could be true.
Great theory, but if you're right I wonder how it will be portrayed. The vast majority of the marines wouldn't matter anyway, though I suppose less energy could make them more susceptible to CoC Haki. The only ones who really matter are Sengoku, Fujitora, Tsuru, Maynard, and maybe Bastille if he's recovered. I can't really see any of those people falling over due to a low red blood cell count or whatever. Okay, maybe Sengoku because he's having so much fun and he might let Luffy get away as a favor to Garp/Law. Bastille shouldn't have donated since he was wounded himself, Tsuru wouldn't have had time, and Maynard has already been brushed aside before. That just leaves Fujitora.
It's a cool theory, but I think the practical upshot just loops back to whether Fujitora is being honest about really going after Luffy full-force. If he's not, this could serve as cover for letting Luffy get away. If he still is, though, it serves as a nerf to let Luffy get away, pissing off fans and leading to endless arguments, or it doesn't affect him at all.
The only really good solution that indisputably preserves Fujitora's cred is if he stuns us with a crazy display of power and Luffy narrowly escapes by the seat of his pants.
Luffy "Today I found a watermelon on the ground when I was walking outside. It tasted good. Speaking of which, Usopp offered us to do a 
