Must agree with you... if the frequency has become so busy that we don't have time to start our transmission with a polite "Goodmorning" or "Goodevening", it must show us that we are reaching a saturation point.
I really admire those guys/gals on the ground who vector us about that crowded airspace but I think UK (and European) aviation in general must take a good look itself before we start some unpleasant trend.