I haven't noticed anyone mentioning this so I'm sorry if its a repeat. I really like the Prepositional Use diagram in the Word Study guide. The Translation Ring is nice too. While I'm on the Word study I like that the Greek and English are side by side and highlighted. George S. is probably appalled at this :-) but I applaud it. The only thing I'm not as fond of is that the Philo results are displayed in a separate window after a click. However I could see this becoming something i appreciate over time.
In another post under Beta 1 I mentioned that the thought came to my mind that Logos may be moving more towards library management then Bible Study. some of the reason I think that thought came to my mind was because a lot of the new Bible Study features were not announced "Hey, Check this out" features but more natural feeling features. I find myself saying a lot more "was that in 3.X? and only after looking back at 3.x do I realize it is a brand new feature. I say this as a huge complement to Logos. Right now the Beta bugs may have us overlooking a lot of the great 4.0 enhancements you have made. I have a feeling as things get more refined we are going to say more and more "I didn't even realize how nice that change/upgrade has been!"