I think your revised schedule looks great!
My family loves having dinner at Chef Mickey's the first night--it's so wonderfully DISNEY and you get a glimpse of the monorail, castle, etc. to get you really excited about the next day.
The only thing I think I would change, for my family at least (two kids 3 and 5) would be to maybe drop or switch out one of the table service meals on your MK day. I don't think my family would be too excited about two big sit-down meals in a row. Not a big deal though. It might be a nice break from the hot weather.
Have lots of fun, and don't worry! You sound like a flexible person so you will certainly have a good time.