Could we just get an EU wide ticketing system. So tickets from every national train company are accepted by all the other ones as well and stuff like delays work. It is awfull that having a delayed SNCF train and you missing a RENFE one due to that means you need to buy a new ticket for the next RENFE train.

The insane part of Deutsche Bahns website is that it is often easier to use then the one from other EU countries, but has basicly all timetables in it. You can look up RENFE connections for example, without booking them.