These are remasters, not remakes like Switch Super Mario RPG is. There's no indication thus far that any script or visual changes would be substantial. And if you want something faithful to the original Japanese release, then you wouldn't want the Working Designs versions to begin with.

Dragon Knight is a literal hentai game series, so I don't know what you expect when those games were ported to home consoles like the Super Famicom. Most home consoles don't allow explicit content, and even the ones that do (PC Engine, PC-FX, Saturn, etc.) generally don't allow the same level of content as computer versions. So it's either edited content or no port at all, and having retro games exclusive to long-obsolete, Japan-only computers doesn't exactly make them particularly accessible these days. With series like Dragon Knight, a lot people appreciate them for the gameplay more than the erotic content, so plenty of people don't care if that content is removed as long as they can play the game itself. Furthermore, when it comes to Japan's PC game market, it's common for explicit content to be added just because it boosts sales, not because the developer feels it's an intrinsic part of the experience. It's not unusual for an all-ages version of a visual novel (often with more story added compared to the adults-only original) to be regarded by a developer as the canon or definitive version, rather than the original adults-only version.