The layout of the RPD is still very good for me. It really improves on RE1 by being more logical for the player while limiting backtracking to a minimum.
That was always my thing. I still feel to this day it doesn't make much sense. Like I know it was a art museum prior. But it's just really odd compared to the Spencer mansion. Though I guess another aspect might be you technically needed to beat it 4 times to see it all.