Stern has been doing a lot better with code. Not perfect, but better. GOT shipped with a lot more code than anyone expected, and the hope is that the trend continues. The DMD is what it is - I'm happy that they aren't using it as an excuse to bump the price $500. I love CDMD, but it's in no way a needed upgrade.
As for getting an LE - good luck. Most distributors sold out day 1. But given that LE and Premium are the exact same game, you are better off getting a Premium (assuming you didn't want Hulk Green). And Jack Danger is doing a livestream from Stern on the 15th. You will be able to see how the Pro shoots on that date.
Regarding the art...You have seen ZombieYeti's art before, right? I would never call it amateurish, haha. Maybe not for you or not your thing, but it's pretty incredible given what it could have been (clip art assets via the asset pack). The artist who did the work is a superstar. It's more in line with the more recent cartoons and whatnot, so that may be what you're seeing.
If you're seriously considering getting a GB, I would definitely check in on the stream later this week. Looking at the layout, it looks like they started with TWD as a skeleton and fleshed that out. I will find and play one, but I agree that the way it shoots is still a HUGE question mark.