Specifically is it too early for the seraphim to be taken from the world government?
Like what if luffy leaves egghead with the 4 seraphim there. Potentially some of them joining the crew or at worst allies. 3/4 of their original versions of the clones are each really close with luffy. Each having potential as strawhats (jinbe obviously being one). As for mihawk he at the very least has always had tons of respect for luffy even back in the east blue
All 4 might also have ties to nika/joyboy
As for why buggy could take in the other 3? It’d be a good way for them to not only gain more power but Moria and Doflamingo were also there with the other 3 at Roger’s execution. On top of that the seraphim “coincidentally” were all arc antagonist that luffy fought. Plus they’re already after cross guild anyway so they don’t have to go out of their way to get the real ones