Yes, it could indeed improve the ox room, as well as the crypt puzzle at ending 5, so that the endings are a bit more accessible and can be done without a walkthrough. In any case, I congratulate you on everything you have achieved without looking at the walktrough. As I have indicated many times, not all endings were meant to be easily discovered.
Now I'm working on "The Legend of Skye", where I'll fix many mistakes I made in "The Castle" to make a much better game :)