To me it is not a matter of brake markers. It is the fact that the track narrows so much there. If you were to get tangle with someone under braking or whatever it may be. There is a very good possibility that someone is going into the concrete wall. I would suggest a reconfiguration of the corner angle. Maybe move the inside cones closer to the inside and maybe put cones to move drivers away from wall.
I am speaking of this from experience I did lock up there last year in practice and was fortunate to spin the opposite way of wall.