Disclaimer: My experience is just brief target dummy testing on live with all the different classes/specs with a few talent variations. I don't know how artifacts will change things, so this is pretty much just a first impression (which still should hold some value, as first impressions are important).
But yeah, to me the new demonology seems to play a lot like affliction. Just instead of watching dot timers, it's watching demon uptime timers - it really feels like a different skin to the same play style. Warlock just doesn't seem to have three distinct specs to me.
Is anyone else feeling that way, or is it just me?