You should avoid having photoshop do anything automatically if you can. As long as you have a good monitor and good eyes, everything you do by eye will be far better than what software can do. Turn off all image correction in your camera and do levels, contrast, and saturation by eye.
Use the fewest pics you can use to make it look good as far as perspective and whatever else is going on in the pics. Make the panaroma. Ignore the exposure differences and line up the pics to look good.
The basic idea is to cut pictures in half or more sections. change the lightness to match the next pic, and use soft edges to blend the pic together. Below I took an example section like it was one pic, made two copies - one for right edge, one for left, matched the left pic's lightness to the adjacent pic, took a giant eraser with 0% sharpness and erased the right side of the pic. Below is example.
You'll see that doing it this way means you'll probably only need a few pics. If the exposure really changes, you can add extra pics for exposure. You know, cut a pic into as many exposure slices as needed.
Your original example:
This is the section of your example I'm treating like one pic. Make two copies of it, one to match the right one to match the left
Here is that pic with the lightness on the right edge changed to match the next pic to the right. You see how the left edge has gotten way too light:
Then do the same with the left edge pic. Match it to the left edge and then do a super soft edge so it blends. I just swipe with a giant 0% hardness eraser but you can use marquee with feather to do it precisely
Make another copy of the pic with the right edge's lightness changed to match its neighbor to the right
Then put the half cut left edge layer over the right edge layer, check to see if it looks ok in the middle - if you can see the exposure blend