No to belabor the point, but the issue with the driving line is that the suggested point is not static, it's dynamic according to car speed, so trying to build consistency by using the same braking points is very difficult.
I speak from experience, I used the line for about the first year on Prologue, but got fed up with it while running a WRS event, immediately found more speed by using track-side braking points, and never looked back.
For turn 1 this week, use the white lane marker lines. After the 3rd line following the Start Finish is a good place to start to find your limit.
Turn 2 (Not counting the kink as a turn), use the pole shadow on the left leading up to the turn.
Turn 4 (next right hand "hairpin") use the tarmac cutout on the left. You can go just past, but not much.
Turn 5 (Onto banking) use the tarmac cutout on the right.
Bus stop, use the break from concrete to grass on track left, just after, and I've found 4th gear to be both faster and more consistent.