Like, there are full digital character doubles, CGI vehicles, obviously CGI sets-- like, there are almost certainly more shots with CGI than without. It's just that there's also a lot of insane practical stuff in there too, so it's hard to tell what's what when you're caught up in the madness. Which is how CGI should be. If you're noticing the CGI, you're not making your movie correctly.

And sure, some of the CGI in this trailer looked a little too smooth, a little unfinished-- I strongly suspect the FX in this trailer are not done. George Miller has yet to release a movie in his entire career that doesn't look fantastic. I'm not worried at all.