Random comments
1. Yeah, it sucks we can't see any rituals, but honestly, they just gave us the entire class ability progression chart. I'd like to see rituals as well, but if they're going to be doing this several-times-per-week preview thing, they can't give away the whole store up front.
2. "Observe Creature" doesn't do it for me. Nor does "View Object." If those are the names we're going to get when naming goes strictly literal, then bring on the fancy names. I'll take a five word phrase that invokes two colors, an animal, a magic related adjective, and a sort of related verb over "view object" any day of the week. "I cast View Object." Seriously?
3. Four encounter powers at level 30 doesn't bother me. First of all, that's class powers. Several races have encounter powers, or grant additional powers. Many magic items grant encounter powers. You don't want too many encounter powers in the game, because a 10 to 15 round combat probably shouldn't involve an encounter power every single round.
4. Retraining has the ability to break verisimilitude. But it also has the ability to be very thematic (exchanging levitation for fly, etc). Which one it turns out to be depends a lot on you and your players. Making rules to require it to be thematic would probably be a huge hassle, so I'm cool with them just leaving it up to us to season to our taste.