Hi,
as subject says, would be great to have the ability to select more areas than one for reference. For example if i have a area with changing light on the left of the image, an area that i don't want to consider in the center, and another area that i want to consider on the right, should be great to select those to areas on the left and right but not the center area. So the "meaning" funcitions should be more aderent to global scene.

You are right, in some situations this could be useful. But normally you should get the same result if you only select the area on one side.
You could as well experiment with animated reference areas. Just set one on the first and one on the last image and they will get animated. You can even create Ref.-Area-"Key Frames" inbetween by setting different Ref.-Areas on different places in the Sequence.
If you double click onto the preview Window they all would be reset.