TWD has always been a great game, just takes a while for people to understand the potential.
The good thing is, there is such a huge list of scoring opportunities. That combined with the inlane multiplier and double playfield you can score big at any moment in the game. It seems really easy but if you try too hard it won't work.
But once you get a good mode going, combined with multiball(s), multikills, etc... your score takes a leap across the ocean.
On ACDC you can cash in the song jackpot with a multiplier. On TWD you can build up your mode scoring (with multipliers) and then cash in big on the final shot in a mode. If you play good, your multikills are worth a lot more and this can count up really nice. This makes also horde more valuable, etc etc..
I own the game some months now and I'm still surprised by all the different ways to score big. But you have to play it right, no gifts.