Bracketing or not bracketing?

( click here to see the same with camera settings )

Nikon D70 - ISO 200 f/11 - Developed in Nikon Capture NX with WB and D-lightning to 16-bit tif and converted to jpeg in Photoshop
Bracket -2 EV ~ 1/30 sec Bracket 0 EV Bracket +2 EV ~ 1/2 sec
Raw -2 EV ~ 1/8 sec (mouseover to see diff.) Raw 0 EV ~ 1/8 sec Raw +2 EV ~ 1/8 sec(mouseover to see diff.)

 

Bright area noise:
Bracket -2 EV ~ 1/30 sec Bracket 0 EV ~ 1/8 sec Bracket +2 EV ~ 1/2 sec
Raw -2 EV ~ 1/8 sec (mouseover to see diff.) Raw 0 EV ~ 1/8 sec Raw +2 EV ~ 1/8 sec(mouseover to see diff.)

 

Dark area noise:
Bracket -2 EV ~ 1/30 sec Bracket 0 EV ~ 1/8 sec Bracket +2 EV ~ 1/2 sec
Raw -2 EV ~ 1/8 sec(mouseover to see diff.) Raw 0 EV ~ 1/8 sec Raw +2 EV ~ 1/8 sec (mouseover to see diff.)

The +2 EV reveal the noise in the extracted picture than in the camera bracket shot!

Out-the-window area detail, noise and blooming/CA:
Bracket -2 EV ~ 1/30 sec Bracket 0 EV ~ 1/8 sec Bracket +2 EV ~ 1/2 sec
Raw -2 EV ~ 1/8 sec (mouseover to see diff.) Raw 0 EV ~ 1/8 sec Raw +2 EV ~ 1/8 sec (mouseover to see diff.)

Loosing details in the -2 EV extracted picture!

Highlight area noise and blooming/CA:
Bracket -2 EV ~ 1/30 sec Bracket 0 EV ~ 1/8 sec Bracket +2 EV ~ 1/2 sec
Raw -2 EV ~ 1/8 sec (mouseover to see diff.) Raw 0 EV ~ 1/8 sec Raw +2 EV ~ 1/8 sec (mouseover to see diff.)
D-lightning reveals more noise