I totally agree. So far I am liking it more than BfA and I actually am one of those who actually enjoyed it. The story is more epic and suspenseful this time around. The idea of going on a "suicide mission" into the Maw felt exciting. The part where you rescue Anduin just to be separated again actually left me feeling a little, I guess you could say, concerned for him and the others. And it's just in general more interesting than Legion and BfA. It just feels like there's more going on this time.
So far I have only been able to get about halfway through Maldraxxis which I have to say is an awesome zone. Bastion too. Which actually brings me to another point. So far the zones don't feel overly complex to traverse. BfA did a good job of this too but to me it just feels like they improved on it a bit more making it feel like I don't really need a flying mount or even want one to be honest.
So yeah I'd say as far as first impressions go SL left a good one. It even had one of the smoothest launches I think we ever had. I don't recall having a single issue. It's amazing the amount of good a simple delay can be. I can just imagine what it would've been like without a delay.