The Dodgers script with a red baseball and streaks (or "shooting ball," as we refer to it internally) has been in use since at least 1938. Were we about to change our primary mark because of its flaws? No way. In fact, the logo and script have gone through several tweaks and redrawings over the years. We're simply viewing these latest tweaks as part of this evolution.
The most obvious change is the thickening of the ball and streaks and making the line weights uniform. This was done mostly to solve the problem of the red lines getting lost at smaller sizes.
In addition, the Dodgers script was given an overall "refresh"—angles are sharper/cleaner and the script now has a more natural flow (the loop on the D, elimination of the stub on the o, the transition from the g to the e). The end of the underflourish also has an inverted scoop, subtly mimicking the underflourish on our jersey script.
Yeah, you gotta be a font geek to appreciate this. Speaking of which, anyone read "Just My Type" yet?