Firstly I think the cgi and production is better than the original walking dead or fear of the walking dead. The colors pop more and it ain't as shadowy, while still being bleak and dystopian. Vfx is better and colors are more vibrant.
We get to see that the old Negan is still there, after seeing his character arc in twd into becoming the antihero. Jeffrey Dean Morgan definitely perfected Negan. There's still pretty good and gory zombie skull bashing, still has rival survival groups at war reminiscent of the parent show. It honestly feels like an extended filler episode of Maggie and Negan, the way twd used to, except this time it's a whole season. Those were used for character development and that's what it feels like now, character study into Maggie and Negan's relationship as they're somewhat forced to work together but for longer this time around.
I think, almost obviously, they're what carries the show since they are fan favorites, I haven't had my mind blown away but so far so good, only six episodes in so it doesn't have much time to get you invested. I don't think being a new fan or someone whose already watched the original makes that much of a difference, I'd still recommend doing that first, just that that's 11 seasons to go through. It'll definitely help understand Maggie and Negan's history.
I wouldn't say it's super promising but it's capable of becoming something good. I'm always looking forward to the next episode and hoping it only gets better while learning from the mistakes of twd.
My only concern would be having a burnout, as I said there's an 11 season original, 8 season sequel, another 2 season sequel, another one season sequel, and more sequels in the works other than Dead city.
So this has to be really good and avoid repetitiveness to captivate audiences again for something they've already watched for 22 seasons and counting.