So far, I've liked the new episodes. I also like the Xindi 5-species concept (although I find the Aquatic Xindi to be a bit much), and I find I like the "chaotic region of space" subplot, even if they don't have a 'realistic' explanation for it.
The Trip/T'pol thing seems a bit forced: Were they afraid of an Archer/T'pol relationship?
I Don't think the infected crewin "Extinction" recovered "too quickly", at least not by recent trek standards. The same thing happened to Most of the crew of the Enterprise and Geordi, and they seemed to be fine even quicker!
I'm actually bothered by what I see in the up coming episodes:
Next week, the obligitory: Alien slave girl episode! Now with girl on girl action!;)
Week after that: 28 Solar Units later! (If that episode starts with Malcolm naked and alone in Sickbay, I'm turning in my phaser and Comm badge!)