No idea if this helps but: I think it's the same servo ABS system as the R1150GS, which fails in that way over time - and not all bikes, some go on forever with no problem.
When they fail, removing the ABS system invariable results in a sweet set of brakes, using the same hoses as the ABS system (not the hard metal ABS pipes, but the flexi's), but without the ABS. Loses 5kg as well..
Been thinking about a K1200RS, and on the basis that the brakes will mod out to a useful set, it still feels viable to me.