Marineford was supposed to look cute
- Neither Yonko has gone all out, even remotely yet.
- Not one side has had a significant character "drop" yet. The "4" Number fell this chapter but he honestly looks fine, just caught off guard by Franky's beam.
- The F6/Calamities have virtually done nothing big yet. Half of them haven't even transformed. Hotei/Fukurokuju haven't done anything.
- Marco/Pero aren't even at the battle yet.
- Law/Kid/Killer/Hawkins/Apoo haven't done anything significant since the beginning.
It's important to remember that Oda almost always escalates conflict as he goes. Everyone is currently fine. All of the Yakuza, Samurai, etc have yet to fall. None of the Minks/Scabbards either. None of the Mimiwarigumi or Onibawanshu that are notable.
This shit is ultimately STILL only getting started. Even if it ends badly in 5-10 chapters, it won't result in tons of people falling because there's not enough time for it. When things start to get "worse" you'll know. Oda ultimately does increase tension but it takes time.
Hyou saying the chapter title should be clear indication that Oda is setting up something bad in the future.