That guide works just fine. There's nothing that's been changed, it's still how DBC edits are done.
No, as far as I know, Blizzard cannot detect, nor do they care about, simple model edits such as these. They care about exploitational model edits, such as Baron runs and crap like that.
EDIT: Also, I'd like to reiterate that I am indeed continuing with the edits, it's just taking longer to get all of my ducks in a row. But, once I do, the whole editing process should go much faster than it does right now.