As a long-time Drop7 fanatic, I can say without doubt that this new update is HORRIBLE. Faster load times? Great. Game Center support? OK, sure. But that's where the good stuff ends. The original's minimalism has been 'cuted' up with annoying and distracting animations, despite the game's basic style clearly being something that would be perfect for iOS.
Elsewhere, the new music is dreadful, the sound effects appear to have been set to random volume levels, the lighter theme is unhelpful and means the numbers (i.e. the important bit) no longer stand out, and the ads are truly awful. When you're trying to figure out your next move, you don't really need dancing pandas bouncing about at the bottom of the screen.
Drop7's core remains the kind of thing that should easily enough secure a 9/10, but this update drags Drop7 way, way down. In its current state, I'd be hard-pressed to even give it a 7.