The Hiraishin no Jutsu and it's variants are a very good counter to Kaguya.
What is the different between arriving moment of FTG and Sasuke teleportation, it still the same movement that is teleported and then you must gonna make a second move that is attacking. That is when you using FTG Level 2 that is Kunai tag. Unless FTG users have marking Kaguya in the back, no hope to attack her after teleporting. Madara have given FTG user a lesson to be learn. Plus how FTG user reaching someone that fighting in the sky constantly.
They can't afford to throwing Kunai every second, that look hilarious .