I like the changes, myself. Well, there could be more space for the plotted route, but overall, I think they did a fine job. But like the saying goes, you can't please everyone. And yeah, I agree it was a rather big download, but it was more than graphical changes. They also fixed some bugs. And added a new one or two. But then as the song goes:
99 little bugs in the code
99 little bugs.
Fine it down patch it around
127 little bugs in the code.
It's just the nature of the beast. The thing is so complex that it's almost, if not totally, impossible to account for every effect changing a bit of code is going to cause. If you were to see the code that makes up this game you'd probably say, "Geez!! What a bunch of gobbley gook!"