What does MATs say.
I rang an approach controller the other day to discuss this issue. He referred to his "MATS" which also had been amended to use the term "ATS surveillance service".
In his view, this change was a terminology change only - not any change to actual procedure. He agreed that the change had been poorly effected and would most likely cause a great deal of confusion.
P.S. Please reread the bottom portion of my previous post (made last night) - I have edited it this morning to add the phrase "disregard any intermediate assigned altitude".