The second aspect is simply reading music, that is reading music that we already know roughly what notes to expect, that we have spent some time actually learning and some-what memorising the notes. With that in mind, I don't think you should specifically be aiming to read it like it was sight reading but more like "queue cards" or "prompts" to keep your brain in check
I’ll eventually start to look at the upcoming bar, not visually naming any of the notes , but recognising the shape of the bar as a whole and therefore knowing what I must play next. The sheet music becomes a prompter of sorts. This is the only that I can speed up the piece. I suppose I want to know if this is a bad practice or not.