The current one actually never bothered me. I find it so much better than the horrible Mustang interior.
The only thing I miss is the original steering wheel design they had a couple of years ago. Which was much more original than this corporate looking one.
Otherwise, I think the new grille works. And the new tail lights make the rear end a bit cleaner.
Nothing is really an improvement. I guess they had to change something without spending too much cash.
Since there is an all new Mustang coming out next year....