Dark Souls was created to bring the series to multi-platform since Sony owns the rights to Demon's Souls.
Bloodborne is a deliberate change, not a necessity.
Doesn't mean that they can't change it for the worse. The loot system is categorically worse. I'd argue that the trick weapons are are an improvement over the wealth of useless weapons that would drop previously but that's it. In terms of armour sets and, more importantly, fashion souls, your choices are super limited. And they didn't have to be.
Even if heavy armour isn't a thing in the game, let the enemies drop their sets. Most of it is cloth anyway. Surely it wouldn't matter.