Lightroom :: Vertical Perspective Correction In 4.2?

I recently purchased LR 4.2. I already have PSE 7 and have used it for several years. I have been trying to straighten verticals in photos of tall buildings, old courthouses, etc. where I had to point the camera up to capture the image I wanted (capture the highest spire and the base of the building and a little of the surrounding area). Photos taken like this end up "leaning" backwards quite a bit and, if shot from an angle especially, some of the verticals are seriously disorted (not just perspective). I usually line up on one vertical side when taking the picture; this results in the vertical on the other side being stretched outwards at the bottom compared to
 
PSE has a filter that allows you to correct camera distortion including vertical perspective that works pretty well. PSE also has some distortion functions that allow you to stretch, skew, or free distort an image. I use skew to take the side of the picture where the bottom is wider than the top (sloping from top to bottom, left to right sort of like a slash "/" character). I select the bottom, left corner and pull it in until the vertical looks about right.
 
So now that I have LR, I wanted to see how its distortion correction worked compared to PSE.
 
I took one of these photos like this and adjusted it in LR. The first thing I noticed is that LR does not have any skew capabilities. It can't correct for more than relatively simple vertical and horizontal distortion. That's disappointing because I don't really want to export my file as TIFF, import it into PSE, then convert it to 8 bits (my version of PSE won't do camera distortion or stretch/skew adjustment on 16-bit images), adjust it, then export it back out to my TIFF file, then import that file back into LR.
 
The other oddity I've noticed is that the vertical perspective correction in LR tends to stretch things vertically when large amounts of vertical perspective correction are applied. What happens then is that an old style courthouse which has a a smaller dome on the top, the smaller dome gets stretched vertically and becomes more "skinny" - taller and thinner. So the vertical distortion correction, in large amounts, just introduces more vertical distortion by vertically stretching the image. PSE, on the othe rhand, corrects the vertical distortion but does not change the proportions of the subject significantly - no vertical stretching.
 
1) why does LR offer perspective and horizonal corrections but not distortion controls like skew?

2) why does LR vertically stretch my subject when I use a lot of vertical distortion adjustment when PSE does not, and what (if anything) can I do about it?