Since they were able to bring this to GoG with some tweaks and enhancements the original PC release doesn't have, does this mean a possible modding scene?

Imagine some sorta mod pack that enhances the graphics and such a bit (not majorly) just to clean it up a bit for high resolution screens now (plus widescreen too).

Would be very NOICE!

If the PS1 version can already be played with an unofficial German localisation patch for instance there should be even more modding potential with the PC version.

Also in regards to an unofficial uncensored international version based on the Japanese build:

"The English language version of Breath of Fire IV was censored in several ways during its translation from the original Japanese version.[14] Some instances of harsh language were toned down for North American and European audiences, as well as a few frames of suggestive animation during dialog or story sequences. The three deleted scenes are: 1) A scene involving Fou-Lu decapitating Emperor Soniel is cut from the end of the first royal palace sequence, with the English version having him instead killed off screen. [6] 2) A scene with Nina and Ursula bathing was also deleted. In this scene Nina asks Ryu to stand guard as they bathe. Ruy hears the girls talking but can't see them. Nina expresses her surprise upon seeing Ursula's body. Ursula is reluctant to discuss the matter (implied large breasts.) At this point Ryu feels tempted to sneak a peek but the girls notice him and Ursula fires her gun at his direction and Nina calls him a pervert. 3) A scene after Nina and Ursula were asked to spend a night in the ship to prove their bravery was removed. In this scene the sailors, trying to convince the women to give up their plans of boarding the ship, tell them that on the sea misbehaving will lead to spanking. The captain tells the girls they need to show their behinds to prove their determination. Nina is upset and embarrassed but Ursula is willing to show her behind and drops her pants. At this point the surprised sailors give up and tell Ursula put her clothes back on.

[6] References to Scias' alcoholism are also absent,[16] with some of his slurred speech patterns being replaced with a stutter."

the game was never intended to be played in 16:9 or wider only 4:3 aspect ratio. the only way I can see a proper 16:9 is maybe if they extend the FOV but menus and FMVs would have to stay 4:3 because they were made that way

I saw video of widescreen on YouTube. It works in environment cause the area is bigger then what you see on 4:3, while in battle it looks like the same deal, the area in combat is bigger then what you actually see.

You can even see your backline members just on the edge of screen which means they actually come from the backline and not the void.

So a widescreen mod would work.