This is already a reality bro, look at all the recent NSG pics, they all have secondary weapons but they carry them on their chest webbing and not on their thigh which I think is a good idea.
One would assume they'd have these by now, it is hardly a question of funds as these are cheap but the fact we haven't seen them use them to now suggests it is a question of doctrine. I don't think I've seen GSG-9, FBI HRT or SAS with such shields. If the unit's doctrine is about aggressiveness and sheer violence of action perhaps they see shields as defunct but it wouldn't hurt to have them around, maybe they do?
They have that bro.
Have this too, remember the raising day demo?
Post 2008 they did actually adopt a new radio system but it would be good to see them get the noise cancelling headsets and FAST helmet combo you have shown below:
Their current webbing and BPJ is adequate if not on the bulky side, they could certainly get a much better product fi they went for a current generation plate carrier: