Just read the chapter! I have mixed feelings about it because Oda didn't give us yet crucial info about how Haki works.
But before I talk about this, lets start with page:
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Are these strings around Doflamingo's hand on the 2nd panel? It seems that he is doing something to himself, maybe repairing broken bones with strings?
Otherwise I do not see the point of the sound effects ("snap", "Zuzu")
I really dislike that I can't figure out how damaged is Doflamingo. I mean, he took all these monster attacks from Law and Luffy and he still walks around like nothing happened.
On the 7th panel of the same page it seems like the side effect of the G4 is not only fatigue because his Haki was used up but he also loses control of
his rubber ability therefor his body becomes too rubbery.
Next one is this page:
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Burgers actually says that HE is going to steal Luffy's DF, does that mean that Blackbeard didn't use his ability but another way to steal DFs from other DF users?
In this page:
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he is trying to stab Luffy even though he is a martial artist, not a swordman so does that suggest that they cut a DF user and steal their ability?
That could only mean that when someone takes a bite from a DF that piece of DF stays in some part of their bodies.
In the same page, Sabo appears. It was really obvious that he would save the day and I don't really mind that he did.
Now, about the whole "haki has a time limit"…. Well I hope Oda has a really good explanation about it because right now it doesnt make any sense... As far as I know, haki is willpower
and I don't know about you but I don't believe that willpower has its own stamina 
That could explain why Luffy didn't spam his Haoshoku Haki whenever he was up against weak opponents and also why he only took out 50K fishmen instead of all of them in the fishman island
but it still doesnt make sense.
Before I start a conversation like this though, I will wait for more information about the subject since right know I have very limited info about it.
I am sure Oda will explain this in the next chapters...
Now, for the next chapter, it will definitely show some Sabo vs Burgers action but what I want to see is zoro stopping the birdcage and the chapter ending with Luffy dealing the final blow.
I know I am asking for too much but I don't want this to drag anymore... We don't need anymore pointless panels... Just a few pages of zoro stopping the page, maybe 1 page showing Sabo
overpowering Burgers (not defeating, because I suspect that burgers will try to escape with the DFs) and 2-3 pages of Luffy preparing and then dealing the final blow.