On haupstrecke rhein-rhur, with the addition of pis screen I have seen that the displays say that the RE11 services go to Dusseldorf and kassel willhelmshohe. But the br 425 pis only has RE11 Hamm [westf] hbf and RE11 M'gladbach. So those destinations will have to put into the br 425 pis so it looks a bit more realistic. Before you reply, I am aware of the layers where the BR 425 doesn't have RE11s and the other trains have the correct destination displays for the journey [but I don't have those routes so can't have the layers]. DTG has two options, either add the right destinations to the br 425 pis or let the nahverkehr dresden [which I have] BR 146.2, BR 766.2 and BR 143 layer/substitute onto haupstrecke rhein-rhur.
Correct and for the DB BR425 it also needs RE42 Monchengladbach RE42 Osnabruck unless the Dostos have those. For the correction of RE11 Rhein Helweg Express PIS it should be RE11 Kassel RE11 Dusseldorf for DB BR425.