I actually played Xenoblade X originally on the Wii U, but I figured I'd get much better performance emulating it on my PC (some areas are bad, most are better). The censorship mostly applied to Lin/Lyn, who was canonically under 18 in the English version. I think even in the Japanese version she was barely 16 or something. The English version covered her up more in the more revealing joke outfits. With the de-censor & un-dubbing patch, you can put her in a bikini or bunny suit, if you so desire, but I kept every character in their OG outfit (minus the avatar). Also the breast slider for female avatars was disabled (not removed! It's still there, technically) in the English version. One can get around this by booting up the original Japanese version, making the desired character, exporting the character file with the maximum booba (although tbh it looks kinda bad; they're just balloons), and then loading that file up in the patched English version. When it comes to censorship, there really isn't too much, but it's still there. Nothing egregious like other games.
As for space to archive the game...well, I'm actually quite low on space. I have the game on a separate 1TB SSD, but it only occupies some 20~gb . I need....WAYYYY more space now that I got a capture card to record MH Rise.