Lightroom CC 2015 HDR does not work!

Question

I have tested the HDR merge feature in Lightroom CC 2015 using photos taken inside rooms with windows that provide a view of a sunny outdoor area. Both HDR Efex Pro and Photomatix render the rooms interior and the details of the exterior as seen through the window. Using LR HDR the window is just one big blown out highlight. Other problems include:
1) No ability to adjust the amount of tone compression
2) Limited ability to adjust the HDR output in the develop module because the Highlights slider is at zero and the Shadows slider is around 70%.
3) If you click the reset button in the Develop module you get an image with both the highlights and shadows completely blown out instead of the tone mapped image you would see in HDR Efex Pro or Photomatix.
I am stunned that Adobe would provide a feature that works so poorly. With the images I have tried it really does not work at all. What's the story?

Answer 1

Here is a +/- 3 EV HDR that both LR6/ACR9 and PS-HDR Pro do a reasonable job with, where the only adjustments are clicking Auto in LR:
Here are the three images, EV+0, EV-3, EV+3, where to get a reasonable view out the windows, the interior was nearly black and to get a reasonable view of the interior, the windows are nearly white.
Here is a side-by-side of the EV+0 shot with various adjustments applied vs the LR6/ACR9 HDR result with Auto clicked.  Tonally they look similar.  What is better with the LR6/ACR9 version is the view out the windows has more detail and less clipped, and the noise in the darker areas is much better, meaning LR6/ACR9 used more of the brighter image for the floor and more of the darkest image for the view out the windows, which is exactly what HDR is supposed to do: