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The only things the anime arc skipped are
>Bede (he gets the wishing pieces for Rose in the games). The anime still explained where Rose was getting all those wishing pieces from
>The 5th tapestry (could be mentioned next episode)
Besides that, they've shown every little piece of build-up from the games and even used the same dialogue from the games in several scenes
Why do people think this is rushed again? if they took their time the story would still be 4 episodes long, just with a million filler episodes in between each plot-related episode