Just one thought about Behavior Shield. Behavior shield should be remain as one individual shield, because some game-guard software conflicts with it and every user want to play games had to manually exclude game files / change settings causing conflict.
Even official game forum mentioned how to exclude their files in avast settings, or advised to uninstall Behavior Shield. This only could be done by Behavior shield remain individual.
Whether combining shields or not, keeping configurability is the most thing I concern. I love to explore settings

I don't see any major problem with current design, just thinking smaller window would be good.
So...
1. Do you think the v7 UI (in general) is well laid out?
2. Do you like the structuring into the folders (SUMMARY, SCAN COMPUTER, REAL-TIME SHIELDS) and the items below?
3. Do you think the left-hand side navigation bar is a good thing?
Yes.
4. What do you think about the Settings screen? And the other various setting screens accessible throughout the UI?
5. What's your thought on the Current Status page?
I don't see any problem with current design.
6. What about the presentation of the shields (I mean the real-time notifications, toasters etc)?
As long as it keeps its small size and color, no need to change.
7. What do you think about the virus update notifications? (+sounds)
No major problem, just thinking its default duration could be shorten. 20sec is a little long.
8. Any other issues/suggestions/recommendations etc?
As mentioned above, whole window size should be smaller, current is big.