I finished my own playthrough of this hack last night. So far, I really liked the efforts of this project, both for DQ1 and DQ2.
I've noticed this thread accepts feedback for fixes, and there were a few odd things I noticed. This was the first time I finished the NES version, but I played a little bit of the regular US release to check and compare, so I can report issues unique to the hack.
First, the command window seems to try to shorten back to its original size, which also causes some words to get cut, such as "Spells" and "Items" going back into singular, and "Command" erasing one of its Ms. This is most noticeable when you're in the Equip menu, though I think it also happened at some other points, but they happened too fast.
Another thing occurs when buying items. After you select which character will hold the item, the merchant's dialogue won't refer to them, but instead to the one that comes before them in the name list (or loop back to the last one in the case of the first character).
This one I'm not sure if I should consider it, since I haven't played the vanilla ROM all the way to the end, but the NPC (below a ceiling tile) blocking the east side of Midenhall during the epilogue only displays an empty text box when spoken to.
Besides that, other details I was curious about turn out to be in the original as well, such as text during events auto-finishing after a few seconds, using the same character name both for opening a chest and putting it in an inventory, and using the hero's name for messages such as running away even if he's dead.
Once again thanks for the hard work, as someone who is interested in the new localizations, but can't afford them.