In all those cases obvious improvements serve the Dell 2408 well. Excellent contrast ratio and color saturation of a well-calibrated monitor provide more convincing photo picture than older PVA monitors.

Nevertheless color shifting problem of PVA monitors is not curable. If, let’s imagine, you do any color image (I don’t say “color critical”, just color) work for a client which seats next to you – that’s a pain. Your client and you will see two different pictures.

Regarding picture quality, color shifting is the first half of the problem. The second half is a “wide gamut” issue.
As we have seen from the instrumental test, sRGB preset on the Dell 2408 has no practical use. Colors are way undersaturated. Calibration does not help.

Using a default mode leaves us with oversaturated greens and reds. Despite excellent calibration results, pure greens and pure reds are still oversaturated.
How bad is it for photo quality picture on the Dell 2408?

Let's take another look at those myriads of images around us and at those we have just observed. Most of them (90%? 99%?) belong to standard color space, not wide. It says to us that as long as standard gamut images prevail, there will be no 100% correct image on a wide gamut monitor (with a possible exception of high end NECs and Eizos). How much is lost? It may be just fine. It may be awful.
A visual impression depends on how much green and red color present in the image.
The less of them the better the picture.
More about wide gamut.
Regarding the wide gamut issue, there will be two different stories.
You can have an ocean of pleasure if an accurate color tone is not important for you.
Look at those lions again. Oversaturated green makes this picture even better! Dry grass looks fresher. Is it important what color the grass was when two lions kissed each other? No. Enjoy the plot!
The picture with a flower. Color tones inside the flower on the Dell 2408 differ from those on the reference monitor. Are they better or worse? Who cares? Both flowers are good. Enjoy it!
It’s a different story when you look at human faces on the screen. Oversaturated red is not acceptable in this case. It makes healthy faces look sick or drunk.
Depending on what your PC video adapter allows, its color regulators may help a little. Nevertheless a proper calibration is vital here. At the same time, some programs like Windows Picture and Fax Viewer may exaggerate the effect.
From my experience, viewing images in Adobe Photoshop minimizes this problem. Calibrated Dell 2408 behaves way better but not ideal in skin tones while the greens (more forgivable) still pop up.
Does it mean, that the white is green or the blue is green? No!

Blue is excellent. Pure green and red colors look oversaturated, slightly fluorescent.

At an angle – yes! – clear blue sky turns greenish, but this is a part of VA viewing angle issue (color shifting). Look at this picture.