What does this actually mean? Will Sewakai members/believers be forced to make their own party outside of LDP? Or is this functionally just going to end up being a rebranding?

What I mean by this is that functionally are all of his faction members staying in the party and therefore just becoming a block that is currently not organised into a faction but will be in the near future when a political issue warrants it? If they all exist in the party and they all share enough of the same politics to be a faction currently then "dissolving" the faction doesn't change anything other than removing Abe's legacy, history, and attachment to anything that has ever existed. They're scrubbing him from history as if he's a shameful taint. But fundamentally it won't affect their politics going forwards and they'll reorganise into a new faction when something happens.