Yeah I get the sense (and maybe I’m being overly optimistic here) that the6 are trying to freshen up 40k. The new Necrons look really interesting, but then as he mentions , the new Banshees( whilst beautifully designed) are essentially the same models I collected 20 + years ago when they first came out. Part of that is the fan base not wanting change- I argued with other players about new weapon variants but they were dead against it. I find eldar pretty dull now, still love my Nids as there is more scope I think for conversions and kit bashes.
AoS seems so fresh (because it’s new) I love my flying dwarfs and I’ve collected dwarfs for years and the Kurnothi have really grabbed my attention too were in converting my own additions to the war band . Even the factions I don’t collect make the setting look so fun and interesting. Of the course the drawback is the model ranges don’t have as much depth as the 40k or old fantasy ranges did, but if/when they do that might make AoS a bit more design fixed..