Just noticed that the main entrance and exit of the Scarlet Hillside isn't marked with a red star. Don't recall seeing that anywhere else.
Also, while the Spirits of Silverwood exploit has been mostly fixed, you can still make them invisible on the first screen if you warp to them without picking up the eye before the warp. Could probably be fixed by warping the player to an intermediary screen if they don't have the eye and forcing them to pick it up there before warping them to the Spirits of Silverwood. But it's hardly a big deal.
Edit: If you go to the Valley of Rust to save Gustav's lion and glide far enough to the right, you skip the auto save that's meant to happen before the evil wizards.
Edit 2: It would be nice if the game auto-saved after the cutscene where the Astral Corruption happens. Can be a bit annoying if you get killed on your way out of Penitence Village and have to watch it again.
Edit 3: Found another spot where you sink automatically.
Edit 4: Juni gets warped in weird ways near the left edge of this screen during the Grand Sky Kingdom invasion.
Edit 5: The GC you get for defending Penitence Village can be avoided and potentially kill you. Like with the spider, this might not be fixable.
Edit 6: The invasions have improved since v6, but a fair number of exploits remain that can still render certain phases either easier than intended or effortless. Mossgate Village probably has the most exploitable phases. My last time covering the invasions can be seen here:
https://youtu.be/a-p1glECcBkEdit 7: I know you told me it probably isn't worth it, but I had the time to do it, so I went through the script and took notes of all typos, grammar errors and inconsistencies I could find. It's mostly missing commas, but there's more. (I find it rather amusing that the reward text you get for solving the daughter's homework has a blatant spelling error.) I'm not a native speaker, so I can't guarantee 100% that all of these were actually wrong, though I'm pretty confident in most of them. Also worth noting that there are a lot of double spaces (sometimes even more than that). I only fixed them in lines that also had other issues. Might be worth doing a find+replace to get rid of them.
Edit 8: Some of the eternal annihilation phases suffer from CO-induced slowdown. This wouldn't normally be a problem, except it doesn't seem to affect the timer. So most of them tend to be pretty easy due to how quickly they end.
Also, the credits neglect to mention that the Salient Grounds use the Temple tileset by AlmightyZenTaco.