This makes me very happy. I've always considered flat out tech trading to be silly in these types of games (and I usually disable tech trading or at least use no tech brokering). This new system as described sounds much cooler and more diplomatic (build relations thru shared tech efforts rather than exploit each other for tech).
I'm liking that it looks like a lot of cheese has been stripped out (victimizing poor AI with lopsided tech deals being one element of cheese).
I don't see the "dumbed down" thing and man, I'm so sick of that phrase. The majority of the time things change, interfaces get better, gameplay is improved, and someone says it's "dumbed down" because the level of misery players endure has been reduced.
I'll have to play it myself before I judge, because these previews do two things - present facts - and present opinion. Saying "tech trading is out" is a fact. Saying the game "feels like a wargame" is opinion.
I also need to experience the happiness and similar mechanics changing over a full game to see how I feel about it. I like some micro but it can get tedious keeping track of varying happiness levels in many cities, or dealing with health levels. So, the changes as I've read them sound ok - removing elements of tedium. I don't see this as "dumbed down" - I just see it as different - just like the removal/change in corruption between III and IV. To me, managing happiness at the city level and managing city health can be interesting and it's something to do, but overall they have little to do with your global strategy or expansion - more like constantly messing with it slows down the big picture. So, we'll see.
So, the real question is, if all these outlets essentially have a demo to play with, where's the demo for US to play with? Hmmmmm?