The dungeon got put back in the shelf. It’s just been hard to justify its existence in the game.
And the new recruiting system is almost certainly permanent. Doubt Arc’ll remake things again.
Most choices don’t have that big of an effect… If they have any…
That dialogue is the same regardless. But for a reason you might not be considering, probably because we don’t have enough information yet.
There will be different endings, but Arc has always said something along the lines of “You’ll get the ending you’re aiming for”.
So don’t sweat it, play how you want to play.