Smart Collection features I don't see in LR4 beta and wonder why not

Question

I've been playing with the new LR4 beta for all of 10 minutes now, and am disappointed to see that Smart Collections haven't moved forward at all.
Things I'd hoped to see:
In the Edit Smart Collection window, why when you add a new rule does it always default to "Rating"? How is that the most likely thing I want? Sure, make it the default for the first rule, but thereafter, I think it would be a lot more useful if it added another rule of the type on the line you pressed '+' on. That is, if I have a "Keywords...Doesn't Contain" rule and press the '+' button on that line, there's a better chance that I want another such rule than that I want yet another "Rating" rule.
Continuing the previous, I think the second rule added should follow slightly different logic. If the default Rating rule wasn't changed to a different type, the default for the second rule shouldn't be "Rating" again to clone the first rule, but rather pick the second most likely rule type. Does Adobe have usage statistics for people's Smart Collections to draw on?
For Keywords rules, there aren't negative operators to match all of the positive operators. So we have Contains, and Doesn't Contain, but we have Contains All and lack Doesn't Contain Any, and we have Contains Words but not Doesn't Contain Words. You can get the desired effect by nesting the positive version in a "None of the following are true" sub-rule, but this feels clumsy. Either give us a symmetric set of logical operators, or take away the negatives and give a clean way to negate arbitrary rules without nesting rules when not needed.
Nested rule sets aren't discoverable. I stumbled across this feature by accident, and only then because I knew how to do the same in iTunes. I'd rather see a third button to the right of each rule line that gave a way to create a nesting than the current magic Option trick. One of the great things about Lightroom is how discoverable most things are; you scarcely need the manual. This is a sharp corner than needs to be knocked off.
There's still no way to refer to one Smart Collection from another! iTunes has had this since approximately forever. It is very useful to be able to extract common rule sets from multiple Smart Collections and simply refer to it from others. We call this the DRY Principle in programming, and it's a Good Thing.
No new Smart Collection rule types. At minimum, I'd hoped to see rules for megapixels and pixel dimensions. I'd like to be able to find all the pics with a long edge 640 pixels or less, for example. Megapixels is actually less useful, because it can be fooled by high aspect ratio images. A banner 4000 px wide and 100 px tall is "only" 0.4 Mpx, but it probably doesn't need to be any bigger. (Yes, I'm aware of Jeffrey Friedl's plugin. He wants this built into LR4, too. )
We don't even get one new rule having to do with geoencoding. Just off the top of my head, I'd kind of like to have a Smart Collection that found photos taken within 100 feet of my home's lat/long and didn't contain the keyword "home". I have many such Smart Collections in a Collection Set called "Warnings", each of which automatically checks my photos for something that I often forget.
You can't reorder rules or move them into or out of groups. I have Smart Collections with a dozen or so rules, and some with logic nested three levels. When assembling such complex little beasts, it isn't always clear while building it what logic order will give the desired result. You have to iterate, and that often means taking a perfectly good rule and moving it somewhere else. Lacking the ability to reorganize the existing rules, that means creating a new "Rating" rule, changing its type to match, cut-and-pasting the match criteria [if text] and deleting the old rule. Pfagh.
That's enough for now.

Answer 1

Ooops, found one new Smart Collection rule: "Metadata Status". One. Want more.