...in other words, UK court rules that MI5 can continue to carry out its business as usual. Bloomberg would really like you to be outraged by this.
Perhaps you should be outraged by business as usual - looking back historically, the U.K. government has caused quite a bit of havoc (looking at you, Southern Rhodesia). The same power structures that allowed for those atrocities are still in place, so it seems that the fact that they have historically had the authority to murder, kidnap, and torture is a very good reason the courts should remove that authority right now
So if MI5 decided to torture and kill Julian Assange for the luls, they now have that power. What could go wrong?
Nothing that hasn't already gone wrong, they just have a rubber stamp now.