The EU is a slow moving train, at least when the roof isn’t already burning (in which case it can move a lot faster, even if still slower than nation states). The incredible complexity of the topic and centuries of fragmented history in the business don’t help either. But we should not confuse glacial speed with nothing happening. The EU is working on harmonising railways in a lot of different ways and some have already made a meaningful difference. Interoperatibility has generally improved. New projects are constructed generally according to pan-European standards etc. The booking issue is a tough nut to crack but from the recent news I take it that even the Commission is loosing patience and ready to unpack harsher instruments towards railway operators. On one side that helps them “motivate” to find proper solutions on their own, and if not, then doing it the hard way.