I find it funny that so many people in this thread are vehemently denying that the dev team for FFXIV are fans of Bloodborne and incorporating elements from it directly into FFXIV. Look at the Shadowkeeper boss fight. Now go look at Ludwig the Holy Blade. Literally taking huge inspiration for monster design, too. Not just gearsets.
As for what inspired Hidetaka Miyazaki for Bloodborne's outfits, take a gander at this French movie from 2001:
Like yeah, Bloodborne took from old styles and what not, but I mean it's like RyuDragnier is saying. There are too many references too quickly for it to just be coincidental.
The striking set for Cryptlurkers is literally Marvelous Chester's set with an altered mask and hat.
The fending set is an altered variant of the Faraam armor set.
The DRG set is an altered variant of the Yar'har Ghul Hunter set, as are the mage hoods that use that mask.
Now how about that Reaper outfit?
It's the Old Hunter set from Bloodborne, almost to a T.
Stop denying it. It's ok for the FFXIV dev team to make these references. It just shows that they have good taste.