Front Axle - spline wear ... too much?

During some time I've had the feeling that there is too muck slack in the drive train on my D90. The diffs are ok tight. The rear axle has almost new Aschcroft axles w. new flanges. Pretty tight.

However the front axle looks like this: (photo + movie)..

Land Rover Defender front axle. Spline wear. - YouTube

Is this too much slack?... Please share your thoughts.

Lars

you could just fit new drive members but would wear again pretty quickly ,id fit new cvs and drive members and lubricate well ,its become a problem since they sealed hub/drive members from the oil