I'm really glad you put the change Appendix in, as that makes it much more useful for running AL games, where you aren't allowed to play with the monsters that way.
Pretty sure the vast majority of your changes were improvements (I'm less sure on up'd damage output, simply because I play enough that I don't want it to hurt more).
Yeah, it was a great idea, and as you can see above, it wasn't mine.
As for the damage expressions, it all depends on how many min/maxers you have at your table. I see many at mine, so it makes sense to kick it up a notch.