I started by creating a new character and checking out the Wailing Prison. I already left feedback on that in another thread.
http://forums.elderscrollsonline.com/en/discussion/222611/wailing-prison
The testing I have done so far has been a comparison between this character and my V9. The V9 is much better at doing the quests and exploration here than the newbie, who started at level 4. The newbie is able to take on 1 to 2 enemies at a time. The V9 can sometimes handle larger groups without dying, but even when she dies, she managed to take out 1 or 2, and eventually gets them all.
I did notice discrepencies with books, at least the first two I found. For the newbie, they read as regular books. When the V9 read them -- the messaged that I had found more lorebooks flashed on the screen.
Armor is messed up. The one chest piece I picked up on my stealing spree did the usual breaking up into chest armor and shoulder armor. However, when I equip the shoulder armor -- it takes the chest armor slot instead of the shoulder armor slot -- I did report this bug.
I have checked out crafting nodes with both characters and did get the correct crafting mats for each character. That scaling seems to be working as intended.
I'm currently taking both characters through the main quest. I have gotten as far as the fortress. The V9 has completed 1 side quest. The newbie was unable to complete this because, well she is a newbie and doesn't have sufficient skills to do this. I was expecting this, I hope no one tries this with a newbie level when it goes live. I'll check and see if I have a level 10 I can try this with too.
I'll report more later after I've spent more time on the PTS.